From: root Date: Tue, 3 Aug 2010 15:52:53 +0000 (+0200) Subject: Merge branch 'template' of ssh://matthijs@git.stderr.nl/matthijs/servers/drsnuggles... X-Git-Url: https://git.stderr.nl/gitweb?a=commitdiff_plain;h=7d615458ac1ebd389365c222b4d2b21160024fd0;hp=a799b50b1d46b49b57ce3212c2fcf60317e7a6f9;p=matthijs%2Fservers%2Fdrsnuggles.git Merge branch 'template' of ssh://matthijs@git.stderr.nl/matthijs/servers/drsnuggles into mail * 'template' of ssh://matthijs@git.stderr.nl/matthijs/servers/drsnuggles: oidentd: Allow the vserver host to forward connections. oidentd: Add default configuration. --- diff --git a/etc/aliases b/etc/aliases new file mode 100644 index 0000000..b48815e --- /dev/null +++ b/etc/aliases @@ -0,0 +1,22 @@ +# /etc/aliases +# +# The aliases in this file work for any "host" domains (such as +# login.drsnuggles.stderr.nl), but not virtual domains (such as stderr.nl). +# This means that the postmaster address for every virtual domain must be +# configured separately! + +mailer-daemon: postmaster +postmaster: root +nobody: root +hostmaster: root +usenet: root +news: root +webmaster: root +www: root +ftp: root +abuse: root +noc: root +security: root +logcheck: root +munin: root +root: matthijs diff --git a/etc/apt/sources.list b/etc/apt/sources.list index 6b38f75..ea3d98b 100644 --- a/etc/apt/sources.list +++ b/etc/apt/sources.list @@ -4,3 +4,5 @@ deb-src http://ftp.nl.debian.org/debian/ lenny main deb http://security.debian.org lenny/updates main deb file:///data/apt-repository/public/ stderr main + +deb http://ftp.nl.debian.org/backports.org/ lenny-backports main diff --git a/etc/default/spamassassin b/etc/default/spamassassin new file mode 100644 index 0000000..9c16138 --- /dev/null +++ b/etc/default/spamassassin @@ -0,0 +1,38 @@ +# /etc/default/spamassassin +# Duncan Findlay + +# WARNING: please read README.spamd before using. +# There may be security risks. + +# Change to one to enable spamd +ENABLED=1 + +# Options +# See man spamd for possible options. The -d option is automatically added. + +# SpamAssassin uses a preforking model, so be careful! You need to +# make sure --max-children is not set to anything higher than 5, +# unless you know what you're doing. + +# We run spamd as the user "spamd", which was created specifically for running +# spamd, using: +# adduser --system --home /var/lib/spamd --disabled-login --disabled-password spamd +# By default, spamd runs as root, dropping privileges to whatever username the +# client claims to have, which is not-so-secure IMHO. There shouldn't be any +# any clients other than exim that can access spamd, but since we don't store +# any user preferences, let's just run as an unprivileged user. +OPTIONS="--create-prefs --max-children 5 --username spamd" + +# Pid file +# Where should spamd write its PID to file? If you use the -u or +# --username option above, this needs to be writable by that user. +# Otherwise, the init script will not be able to shut spamd down. +PIDFILE="/var/run/spamd.pid" + +# Set nice level of spamd +#NICE="--nicelevel 15" + +# Cronjob +# Set to anything but 0 to enable the cron job to automatically update +# spamassassin's rules on a nightly basis +CRON=1 diff --git a/etc/dovecot/dovecot.conf b/etc/dovecot/dovecot.conf new file mode 100644 index 0000000..1e3cce8 --- /dev/null +++ b/etc/dovecot/dovecot.conf @@ -0,0 +1,106 @@ +## Dovecot configuration file + +# "dovecot -n" command gives a clean output of the changed settings. Use it +# instead of copy&pasting this file when posting to the Dovecot mailing list. + +# '#' character and everything after it is treated as comments. Extra spaces +# and tabs are ignored. If you want to use either of these explicitly, put the +# value inside quotes, eg.: key = "# char and trailing whitespace " + +# See http://wiki.dovecot.org/MainConfig for the available configuration +# directives. See +# http://hg.rename-it.nl/dovecot-1.2-managesieve/file/tip/README for +# configuration of the managesieve plugin/daemon. + + +# We serve IMAP, IMAPS and use the deliver Local Delivery Agent +protocols = imap imaps lda + +# Allow plaintext auth on non-TLS connections. We don't expose the non-secure +# imap port 143 to the internet, just locally for the webmail apps. This should +# therefore not introduce a security issue. +disable_plaintext_auth = no + +# Our SSL private key +ssl_key_file = /etc/dovecot/ssl/mail.stdout.nl.key +# The public certificate (including the entire chain to the root) +ssl_cert_file = /etc/dovecot/ssl/mail.stdout.nl.crt + +protocol imap { + # Enable virtual mailboxes + mail_plugins = virtual +} + +protocol lda { + # deliver wants a postmaster address to send bounces, but we've configured + # Exim to only call deliver with -e, meaning exim will send the bounces. + # Setting this to "" silences deliver. + postmaster_address = "" + # Enable sieve filters on delivery. Also enable virtual mailboxes. We won't + # deliver to them, but deliver will break on the below namespace declarations + # otherwise. + mail_plugins = virtual sieve +} + +# Default logging is to syslog. +# +# Prefix for each line written to log file. % codes are in strftime(3) +# format. +log_timestamp = "%Y-%m-%d %H:%M:%S " + +auth default { + # We use plain authentication, since that works with pam (To use any other + # mechanism, we must use LDAP in password lookup mode, giving dovecot access + # to the user passwords, which we don't really want to do). + mechanisms = plain + + # Use pam for authentication. The default options are fine. + passdb pam { + # Open a PAM session (to make pam_mkhomedir work, for example) + args = session=yes + } + + # Use the getpwnam system calls for looking up users and their homedirs. This + # uses NSS (so the name "passwd" is slightly misleading). + userdb passwd { + # Let dovecot know that nss calls might take a while, due to remote NSS + # lookups. Also, nss_ldap might break without this, due to + # https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=154314 (though this + # might be fixed already, not sure). + args = blocking=yes + } +} + +plugin { + # Sieve plugin (http://wiki.dovecot.org/LDA/Sieve) and ManageSieve service + # + # Location of the active script. When ManageSieve is used this is actually + # a symlink pointing to the active script in the sieve storage directory. + sieve=~/Mail/sieve + # + # The path to the directory where the personal Sieve scripts are stored. For + # ManageSieve this is where the uploaded scripts are stored. + sieve_dir=~/Mail/sieve.d +} + +# Mail is stored in users' homedirs. We use the fs layout, so nesting of +# mailboxes is done using normal filesystem nesting. +mail_location = Maildir:~/Mail/Folders:LAYOUT=fs + +# Default namespace, uses mail_location above +namespace private { + prefix = + separator = / + inbox = yes +} + +# Virtual mailboxes +namespace private { + prefix = virtual/ + separator = / + # Store virtual mailbox in a "virtual" subdirectory. We use the fs layout, so + # nesting of mailboxes is done using normal filesystem nesting. + location = virtual:~/Mail/virtual:LAYOUT=fs +} + +# vim: set sts=2 sw=2 expandtab autoindent: diff --git a/etc/exim4/conf.d/acl/00_exim4-config_header b/etc/exim4/conf.d/acl/00_exim4-config_header new file mode 100644 index 0000000..0a70267 --- /dev/null +++ b/etc/exim4/conf.d/acl/00_exim4-config_header @@ -0,0 +1,9 @@ + +###################################################################### +# ACL CONFIGURATION # +# Specifies access control lists for incoming SMTP mail # +###################################################################### +begin acl + + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/acl/30_exim4-config_check_mail b/etc/exim4/conf.d/acl/30_exim4-config_check_mail new file mode 100644 index 0000000..e3efb36 --- /dev/null +++ b/etc/exim4/conf.d/acl/30_exim4-config_check_mail @@ -0,0 +1,16 @@ + +### acl/30_exim4-config_check_mail +################################# + +# This access control list is used for every MAIL command in an incoming +# SMTP message. The tests are run in order until the address is either +# accepted or denied. +# +acl_check_mail: + deny + message = no HELO given before MAIL command + condition = ${if !def:sender_helo_name } + + accept + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/acl/30_exim4-config_check_rcpt b/etc/exim4/conf.d/acl/30_exim4-config_check_rcpt new file mode 100644 index 0000000..44da6dc --- /dev/null +++ b/etc/exim4/conf.d/acl/30_exim4-config_check_rcpt @@ -0,0 +1,133 @@ + +### acl/30_exim4-config_check_rcpt +################################# + +# This access control list is used for every RCPT command in an incoming +# SMTP message. The tests are run in order until the address is either +# accepted or denied. +# +acl_check_rcpt: + + # Accept if the source is local SMTP (i.e. not over TCP/IP). We do this by + # testing for an empty sending host field. + accept + hosts = : + + + # The following section of the ACL is concerned with local parts that contain + # certain non-alphanumeric characters. Dots in unusual places are + # handled by this ACL as well. + # + # Non-alphanumeric characters other than dots are rarely found in genuine + # local parts, but are often tried by people looking to circumvent + # relaying restrictions. Therefore, although they are valid in local + # parts, these rules disallow certain non-alphanumeric characters, as + # a precaution. + # + # Empty components (two dots in a row) are not valid in RFC 2822, but Exim + # allows them because they have been encountered. (Consider local parts + # constructed as "firstinitial.secondinitial.familyname" when applied to + # a name without a second initial.) However, a local part starting + # with a dot or containing /../ can cause trouble if it is used as part of a + # file name (e.g. for a mailing list). This is also true for local parts that + # contain slashes. A pipe symbol can also be troublesome if the local part is + # incorporated unthinkingly into a shell command line. + # + # These ACL components will block recipient addresses that are valid + # from an RFC2822 point of view. We chose to have them blocked by + # default for security reasons. + # + # Two different rules are used. The first one has a quite strict + # default, and is applied to messages that are addressed to one of the + # local domains handled by this host. + + deny + domains = +local_domains + # This blocks local parts that begin with a dot or contain a quite + # broad range of non-alphanumeric characters. + local_parts = ^[.] : ^.*[@%!/|`#&?] + message = restricted characters in address + + + # The second rule applies to all other domains, and its default is + # considerably less strict. + + # It allows local users to send outgoing messages to sites + # that use slashes and vertical bars in their local parts. It blocks + # local parts that begin with a dot, slash, or vertical bar, but allows + # these characters within the local part. However, the sequence /../ is + # barred. The use of some other non-alphanumeric characters is blocked. + # Single quotes might probably be dangerous as well, but they're + # allowed by the default regexps to avoid rejecting mails to Ireland. + # The motivation here is to prevent local users (or local users' malware) + # from mounting certain kinds of attack on remote sites. + deny + domains = !+local_domains + local_parts = ^[./|] : ^.*[@%!`#&?] : ^.*/\\.\\./ + message = restricted characters in address + + + # Accept mail to postmaster in any local domain, regardless of the source, + # and without verifying the sender. + # + accept + local_parts = postmaster + domains = +local_domains : +relay_to_domains + + + # Deny unless the sender address can be verified. + deny + message = Sender verification failed + !verify = sender + + + # Accept if the message arrived over an authenticated connection, from + # any host. These messages are usually from MUAs, so recipient + # verification is omitted, and submission mode is set. We do this + # check before any black list tests. + accept + authenticated = * + control = submission/sender_retain + + # Accept if the message comes from one of the hosts for which we are an + # outgoing relay. These hosts are only dumb forwarders (nullmailers), not + # real MTAs, so we set control=submission to make Exim treat the message as a + # submission. It will fix up various errors in the message, for example, the + # lack of a Date: header line. + accept + hosts = +relay_from_hosts + #control = submission/sender_retain + + # Insist that any other recipient address that we accept is either in one of + # our local domains, or is in a domain for which we explicitly allow + # relaying. Any other domain is rejected as being unacceptable for relaying. + require + message = relay not permitted + domains = +local_domains : +relay_to_domains + + + # We also require all accepted addresses to be verifiable. This check will + # do local part verification for local domains, but only check the domain + # for remote domains. + require + verify = recipient + + + # Warn if the sender host does not have valid reverse DNS. + # + # If your system can do DNS lookups without delay or cost, you might want + # to enable this. + # If sender_host_address is defined, it's a remote call. If + # sender_host_name is not defined, then reverse lookup failed. Use + # this instead of !verify = reverse_host_lookup to catch deferrals + # as well as outright failures. + warn + message = X-Host-Lookup-Failed: Reverse DNS lookup failed for $sender_host_address (${if eq{$host_lookup_failed}{1}{failed}{deferred}}) + verify = reverse_host_lookup + + # At this point, the address has passed all the checks that have been + # configured, so we accept it unconditionally. + + accept + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/acl/40_exim4-config_check_data b/etc/exim4/conf.d/acl/40_exim4-config_check_data new file mode 100644 index 0000000..fbaacfa --- /dev/null +++ b/etc/exim4/conf.d/acl/40_exim4-config_check_data @@ -0,0 +1,39 @@ + +### acl/40_exim4-config_check_data +################################# + +# This ACL is used after the contents of a message have been received. This +# is the ACL in which you can test a message's headers or body, and in +# particular, this is where you can invoke external virus or spam scanners. + +acl_check_data: + + # Deny unless the address list headers are syntactically correct. + # + # This might reject legitimate mail... + deny + message = Message headers fail syntax check + !verify = header_syntax + + # Don't spamcheck big messages + accept + condition = ${if >{$message_size}{80k}} + add_header = X-Spam-Score: Message too big, not scanned. + + # Deny messages with a large spamscore. The threshold is set by + # spamassassin, see required_score in /etc/spamassassin/local.cf + deny + message = Message was classified as spam + # Check using spamassasin, running as the "spamd" user. + spam = spamd + # Don't reject to some trusted hosts, since they will only generate + # useless delivery failures to innocent people. We check this after the + # spamcheck, so the next rule can still the spam headers properly. + !hosts = +dont_reject_spam_hosts + + # Accept any other messages, but add spam headers. + accept + add_header = X-Spam-Score: $spam_score ($spam_bar) + add_header = X-Spam-Report: $spam_report + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/auth/00_exim4-config_header b/etc/exim4/conf.d/auth/00_exim4-config_header new file mode 100644 index 0000000..98ec0b6 --- /dev/null +++ b/etc/exim4/conf.d/auth/00_exim4-config_header @@ -0,0 +1,9 @@ + +###################################################################### +# AUTHENTICATION CONFIGURATION # +###################################################################### + +begin authenticators + + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/main/main_config b/etc/exim4/conf.d/main/main_config new file mode 100644 index 0000000..771d2b6 --- /dev/null +++ b/etc/exim4/conf.d/main/main_config @@ -0,0 +1,73 @@ +###################################################################### +# MAIN CONFIGURATION SETTINGS # +###################################################################### + +# LDAP server to use for main lookups +LDAPSERVER=ldap://ldap.drsnuggles.stderr.nl:389 +LDAPBASE=dc=drsnuggles,dc=stderr,dc=nl + +# List of virtual domains for which we deliver to any address that happens to +# be configured in the LDAP directory. +domainlist virtual_domains = stdin.nl : stderr.nl : stdout.nl : blues-brothers.eu : foresightsecurity.nl : hekjelarp.nl +# List of real hosts for which we deliver mail to real users. +domainlist real_domains = *.drsnuggles.stderr.nl : drsnuggles.stderr.nl +# The list of domains for which we handle mail ourselves +domainlist local_domains = +virtual_domains : +real_domains + +# List of recipient domains to relay _to_. Use this list if you're - +# for example - fallback MX or mail gateway for domains. +domainlist relay_to_domains = fizzgig.eu : fizzgig.nl + +# Relay messages for all other vservers and the host. We would specify +# +real_domains here, but mixing domainlists and hostlist doesn't seem to work +# at first glance. +hostlist relay_from_hosts = *.drsnuggles.stderr.nl : drsnuggles.stderr.nl + +# Don't reject spam from these hosts, since they are known dumb, but trusted +# relays. They will only send rejects to the wrong people. +hostlist dont_reject_spam_hosts = katherina.student.utwente.nl : kat.student.utwente.nl : *.utsp.utwente.nl + +# Use this domain on any unqualified addresses that get submitted. Since this +# can come from any vserver, just use our main hostname. +qualify_domain = drsnuggles.stderr.nl + +# Let exim know how the rest of the world will try to reach us. +hosts_treat_as_local = drsnuggles.stderr.nl + +# The gecos field in /etc/passwd holds not only the name. see passwd(5). +gecos_pattern = ^([^,:]*) +gecos_name = $1 + +# Defines the access control list that is run when an +# SMTP MAIL command is received. +acl_smtp_mail = acl_check_mail +# Defines the access control list that is run when an +# SMTP RCPT command is received. +acl_smtp_rcpt = acl_check_rcpt +# Defines the access control list that is run when an +# SMTP DATA command is received. +acl_smtp_data = acl_check_data + + +# Do a reverse DNS lookup on all incoming IP calls, in order to get the +# true host name. +host_lookup = * + +# Queue handling +# +# Drop undeliverable bounces after this time +ignore_bounce_errors_after = 2d +# Bounce frozen messages after this time +timeout_frozen_after = 7d +# Tell postmaster about freezing +freeze_tell = postmaster +# Define spool directory +spool_directory = /var/spool/exim4 +# Don't send out delivery delay warnings (by default once every 24h). +delay_warning = + +# Log subjects, for easy tracing of messages and peer dn on TLS connections. +# Don't log complete headers on rejects, that clutters the log. +log_selector = +subject +tls_peerdn +tls_certificate_verified -rejected_header + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/retry/00_exim4-config_header b/etc/exim4/conf.d/retry/00_exim4-config_header new file mode 100644 index 0000000..b6daf3c --- /dev/null +++ b/etc/exim4/conf.d/retry/00_exim4-config_header @@ -0,0 +1,8 @@ + +###################################################################### +# RETRY CONFIGURATION # +###################################################################### + +begin retry + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/retry/30_exim4-config b/etc/exim4/conf.d/retry/30_exim4-config new file mode 100644 index 0000000..e003154 --- /dev/null +++ b/etc/exim4/conf.d/retry/30_exim4-config @@ -0,0 +1,24 @@ + +### retry/30_exim4-config +################################# + +# This single retry rule applies to all domains and all errors. It specifies +# retries every 15 minutes for 2 hours, then increasing retry intervals, +# starting at 1 hour and increasing each time by a factor of 1.5, up to 16 +# hours, then retries every 6 hours until 4 days have passed since the first +# failed delivery. + +# Please note that these rules only limit the frequenzy of retries, the +# effective retry-time depends on the frequenzy of queue-running, too. +# See QUEUEINTERVAL in /etc/default/exim4. + +# Address or Domain Error Retries +# ----------------- ----- ------- + +# Keep mails for 30 days for the domains we're backup MX for +*@+relay_to_domains * F,2h,15m; G,16h,1h,1.5; F,4d,6h; F,30d,24h + +# Use default rules for all other mail +* * F,2h,15m; G,16h,1h,1.5; F,4d,6h + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/rewrite/00_exim4-config_header b/etc/exim4/conf.d/rewrite/00_exim4-config_header new file mode 100644 index 0000000..9a5f53a --- /dev/null +++ b/etc/exim4/conf.d/rewrite/00_exim4-config_header @@ -0,0 +1,8 @@ + +###################################################################### +# REWRITE CONFIGURATION # +###################################################################### + +begin rewrite + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/rewrite/10_ldap b/etc/exim4/conf.d/rewrite/10_ldap new file mode 100644 index 0000000..f994d65 --- /dev/null +++ b/etc/exim4/conf.d/rewrite/10_ldap @@ -0,0 +1,12 @@ +################################ +# Any outgoing mail sent by a user from a domain in local_hosts has its From: +# address and envelope From address rewritten to use his primary mail address +# from ldap. +# +################################# + +*@+real_domains \ + "${lookup ldap {LDAPURL?mail?sub?(uid=${quote_ldap:$local_part})} \ + {$value}fail}" Ff + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/router/00_exim4-config_header b/etc/exim4/conf.d/router/00_exim4-config_header new file mode 100644 index 0000000..0f80286 --- /dev/null +++ b/etc/exim4/conf.d/router/00_exim4-config_header @@ -0,0 +1,12 @@ + +###################################################################### +# ROUTERS CONFIGURATION # +# Specifies how addresses are handled # +###################################################################### +# THE ORDER IN WHICH THE ROUTERS ARE DEFINED IS IMPORTANT! # +# An address is passed to each router in turn until it is accepted. # +###################################################################### + +begin routers + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/router/10_outbound b/etc/exim4/conf.d/router/10_outbound new file mode 100644 index 0000000..774d70a --- /dev/null +++ b/etc/exim4/conf.d/router/10_outbound @@ -0,0 +1,37 @@ +### router/200_exim4-config_primary +################################# +# This file holds the primary router, responsible for nonlocal mails + +# deliver mail to the recipient if recipient domain is a domain we +# relay for. We do not ignore any target hosts here since delivering to +# a site local or even a link local address might be wanted here, and if +# such an address has found its way into the MX record of such a domain, +# the local admin is probably in a place where that broken MX record +# could be fixed. + +dnslookup_relay_to_domains: + debug_print = "R: dnslookup_relay_to_domains for $local_part@$domain" + driver = dnslookup + domains = ! +local_domains : +relay_to_domains + transport = remote_smtp + same_domain_copy_routing = yes + no_more + +# deliver mail directly to the recipient. This router is only reached +# for domains that we do not relay for. Since we most probably can't +# have broken MX records pointing to site local or link local IP +# addresses fixed, we ignore target hosts pointing to these addresses. + +dnslookup: + debug_print = "R: dnslookup for $local_part@$domain" + driver = dnslookup + domains = ! +local_domains + transport = remote_smtp + same_domain_copy_routing = yes + # ignore private rfc1918 and APIPA addresses + ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8 : 192.168.0.0/16 :\ + 172.16.0.0/12 : 10.0.0.0/8 : 169.254.0.0/16 :\ + 255.255.255.255 + no_more + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/router/20_system_aliases b/etc/exim4/conf.d/router/20_system_aliases new file mode 100644 index 0000000..870c02d --- /dev/null +++ b/etc/exim4/conf.d/router/20_system_aliases @@ -0,0 +1,14 @@ +### router/400_exim4-config_system_aliases +################################# + +# This router handles aliasing using a traditional /etc/aliases file, but for +# local hosts only. Virtual domains must take own measures to ensure that the +# postmaster address works. + +system_aliases: + debug_print = "R: system_aliases for $local_part@$domain" + driver = redirect + domains = +real_domains + data = ${lookup{$local_part}lsearch{/etc/aliases}} + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/router/30_ldap b/etc/exim4/conf.d/router/30_ldap new file mode 100644 index 0000000..2f195c8 --- /dev/null +++ b/etc/exim4/conf.d/router/30_ldap @@ -0,0 +1,184 @@ +### router/900_exim4-config_local_user +################################# + +# These routers deal with mail meant for virtual_domains and real_domains. +# The targets for addresses in these domains and hosts are taken from +# the LDAP server. +# +# The first two routers check the LDAP directory to find an object to +# which the mail should be delivered. The first one works on +# virtual_domains, and finds an object based on the mail or +# alternateMailAddress attributes. For example, info@stdin.nl might be +# resolved by that one. The second one works on real_domains and finds an +# object based its uid (i.e., username). For example, +# matthijs@login.drsnuggles.stderr.nl might be resolved by the second +# router. +# +# The next set of routers works when a person is retrieved. They handle +# forwarding the mail to another mail server when the mailHost attribute +# is set but it is not us, forwarding the email to any +# mailForwardingAddresses in the object or delivering the mail locally +# when the mailHost is set. Note that both either or both of the last +# two routers can apply. If none of these three apply, routing continues +# to the last set. Local delivery works by redirecting to username@localhost +# and redirecting to the local_delivery router. This allows for a number of +# different routers (put after the local_delivery router) to handle the +# local_delivery. This is also the only way to get to any routers after the +# ones in this file! +# +# The last two routers work when a group is retrieved. They handle +# forwarding the mail to any members, both rfc822members (ie, addresses) +# and uniqueMembers (ie, other LDAP objects). +# +# Note that this distinction between persons and groups is not made by +# looking at the object classes, but at the attributes. Any object that +# has a mailHost and/or mailForwardingAddresses is treated as a person, +# meaning that only these two attributes are processed. Any object that +# has neither of these attributes is assumed to be a group and has its +# rfc822members and uniqueMembers processed. Any object that has none of +# these properties, will cause a delivery failure. +# +# Note also that only the first two routers have the domains +# precondition set, to differentiate between virtual_domains and +# real_domains. Assuming that the routers in this file will only be called for +# virtual_domains and real_domains, exactly one of these two routers will be +# called. If the lookup fails, the more option ensures that the rest of the +# routers are not called. +# +# The routers in this file assume that the url to LDAP server is defined +# as LDAPSERVER and the base dn is defined as LDAPBASE. No assumptions +# are made about the structure of the LDAP directory, so any object that +# has the mail or mailForwardingAddress attributes is considered a +# valid target for email, anywhere in the directory. These routers do +# assume that a single email address is listed only once. If not, mails +# to the address will be deferred. + +LDAPURL=LDAPSERVER/LDAPBASE + +# This router looks up an object in the ldap directory using its mail and +# alternateMailAddress attributes, for any domains in virtual_domains. +# This handles email addresses in "virtual" domains, since the object +# found does not need to actually have a username (it can even be a +# group). +ADDR=${quote_ldap:${local_part}@${domain}} +ldap_lookup_virtual: + debug_print = "R: ldap_lookup_virtual for $local_part@$domain: Finding person or group with (alternate) email address $local_part@$domain" + driver = redirect + domains = +virtual_domains + address_data = ${lookup ldap {LDAPURL?uid,mailHost,mailForwardingAddress,rfc822member,uniqueMember?sub?(|(mail=ADDR)(mailAlternateAddress=ADDR))}{$value}fail} + # Noop, this router just needs to pass its preconditions, evaluate + # address_data and then pass control to ldap_person_other_mailhost below + data = ${local_part}@${domain} + redirect_router=ldap_person_other_mailhost + # If no objects are found and the address_data expansion is forced to fail, + # stop processing. Note that this setting does not apply when the domains + # precondition fails. + more = false + cannot_route_message = "Unknown address" + +# This router looks up an object in the ldap directory using its uid +# (username) attribute, for any hosts in real_domains. This handles email +# addresses of actual users in this domain, i.e., objects that have uid +# property. +LOCALPART=${quote_ldap:${local_part}} +ldap_lookup_real: + debug_print = "R: ldap_lookup_real for $local_part@$domain: Finding user with uid $local_part" + driver = redirect + domains = +real_domains + address_data = ${lookup ldap {LDAPURL?uid,mailHost,mailForwardingAddress?sub?(uid=LOCALPART)}{$value}fail} + # Noop, this router just needs to pass its preconditions, evaluate + # address_data and then pass control to ldap_person_other_mailhost below + data = ${local_part}@${domain} + redirect_router=ldap_person_other_mailhost + # If no objects are found and the address_data expansion is forced to fail, + # stop processing. Note that this setting does not apply when the domains + # precondition fails. + more = false + cannot_route_message = "Unknown user" + +# If the person has a mailhost configured, and it's not us, forward to +# that mailhost. If this router accepts, no others will be tried. This +# means we're also not processing any mailForwardingAddresses, assuming +# that the host forwarded to will do this. +# +# This entry is mostly future-compatible, since at the time of writing +# there are no other mailservers using the same LDAP directory. But it +# looks cool! +ldap_person_other_mailhost: + debug_print = "R: ldap_person_other_mailhost for $local_part@$domain: Forwarding to a mailHost if it is not us" + driver = manualroute + condition = ${if and { \ + # If mailhost is not empty + {!eqi{${extract{mailHost}{$address_data}}}{}} \ + # And mailhost is not this host + {!eqi{${extract{mailHost}{$address_data}}}{$primary_hostname}} \ + }} + # Then, forward to the other mailHost + route_data = ${extract{mailHost}{$address_data}} + transport = remote_smtp + +# Forward the mail to any mailForwardingAddresses configured +DELIVER_HERE=${if eqi{${extract{mailHost}{$address_data}}}{$primary_hostname}{true}{false}} +ldap_person_forward: + debug_print = "R: ldap_person_forward for $local_part@$domain: Forwarding to any mailForwardingAddresses" + driver = redirect + data = ${extract{mailForwardingAddress}{$address_data}} + # Pass the message to the ldap_person_local router as well, so we can support both + # local delivery and forwarding. However, only set unseen to yes if we know + # the ldap_person_local will accept it. Just putting unseen = yes here doesn't + # work because if there is no local delivery, an error message is generated + # even when the email was forwarded succesfully. + unseen = DELIVER_HERE + +# Deliver the mail locally if the mailHost points to us. +ldap_person_local: + debug_print = "R: ldap_person_local for $local_part@$domain: Doing local delivery if the mailHost is us" + driver = redirect + # Lookup if there is a user that has the target email address in either his + # mail attribute, or one of his mailAlternateAddresses and also has his + # mailstore on this host as its mailhost. + condition = DELIVER_HERE + # Forward the email to username@localhost. There is a separate set of routers + # that explicitly handles the localhost "domain", and has support for things + # like .forward files, procmail, etc. + data = ${extract{uid}{$address_data}}@localhost + redirect_router = local_delivery + +# If any of the two above routers accepted the message, processing will +# stop here! + +# Forward the mail to any full members (uniqueMember) configured +ldap_group_member: + debug_print = "R: ldap_group_member for $local_part@$domain: Forwarding to any uniqueMembers" + driver = redirect + # Lookup the mail address (if any) of each member. This gracefully ignores + # any members without an email address. + data = ${map \ + # Since multipe attributes are separated by ", ", we replace ", " by "\n" + # and use that as a list separator (fortunately it's not just ",", as the + # documentation suggests, since then we would have had one big dn...) + {<\n ${sg \ + {${extract{uniqueMember}{$address_data}}} \ + {, } \ + {\n} \ + }} \ + {${lookup ldap {LDAPSERVER/$item?mail?base?}}} \ + } + # Pass the message to the ldap_group_address router as well, so we can support both + # addresses (rfc822member) and dns (uniqueMember) in a group. + # However, only set unseen to yes if we know the ldap_group_address will + # accept it. Just putting unseen = yes here doesn't work because if there is + # no local delivery, an error message is generated even when the email was + # already forwarded succesfully. + unseen = ${if !eqi{${extract{rfc822member}{$address_data}}}{}{true}{false}} + +# Forward the mail to any mail-only members (rfc822member) configured +ldap_group_address: + debug_print = "R: ldap_group_address for $local_part@$domain: Forwarding to any rfc822members" + driver = redirect + data = ${extract{rfc822member}{$address_data}} + cannot_route_message = "Recipient is not set up for mail reception" + # If this router did not match, stop processing. + more = false + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/router/40_local_delivery b/etc/exim4/conf.d/router/40_local_delivery new file mode 100644 index 0000000..d89df90 --- /dev/null +++ b/etc/exim4/conf.d/router/40_local_delivery @@ -0,0 +1,43 @@ +################################# +# The routers that handle the actual local delivery of mail. These routers all +# work just on the localhost "domain", so any previous routers that want to +# have mail delivered locally should redirect to username@localhost and set +# redirect_router to "local_delivery". These routers are not used directly on +# incoming messages, the first router guarantees this. +# +# Currently, there is only a single router that uses dovecot's deliver program +# to deliver the mail, but others could be (re)added when required. +################################# + + +# Dummy noop router, that ensures that these routers are never called directly +# on an incoming message and enforces that they only be called when a previous +# router explicitely sets redirect_router to local_delivery. +always_fail: + debug_print = "R: local_delivery for $local_part@$domain" + driver = redirect + data = + more = false + cannot_route_message = "Internal error" + +# Dummy noop router, that can be used by other routers for the value of +# redirect_router or pass_router, without being dependent on the (order of) +# actual delivery routers below. +local_delivery: + debug_print = "R: local_delivery for $local_part@$domain" + driver = redirect + data = + +# This router uses dovecot_deliver for delivery +dovecot_deliver: + debug_print = "R: dovecot_deliver for $local_part@$domain" + driver = accept + domains = localhost + check_local_user + local_parts = ! root + transport = dovecot_deliver + # If we get here, some previous router redirected to a non-existing user. + # That should not happen! + cannot_route_message = Unknown user: This should not happen + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/conf.d/transport/00_exim4-config_header b/etc/exim4/conf.d/transport/00_exim4-config_header new file mode 100644 index 0000000..1ce3fa3 --- /dev/null +++ b/etc/exim4/conf.d/transport/00_exim4-config_header @@ -0,0 +1,14 @@ + +###################################################################### +# TRANSPORTS CONFIGURATION # +###################################################################### +# ORDER DOES NOT MATTER # +# Only one appropriate transport is called for each delivery. # +###################################################################### + +# A transport is used only when referenced from a router that successfully +# handles an address. + +begin transports + +# vim: set sts=2 expandtab sw=2 ai: diff --git a/etc/exim4/exim4.conf.template b/etc/exim4/exim4.conf.template new file mode 100644 index 0000000..78c6408 --- /dev/null +++ b/etc/exim4/exim4.conf.template @@ -0,0 +1,1996 @@ +##################################################### +### main/01_exim4-config_listmacrosdefs +##################################################### +###################################################################### +# Runtime configuration file for Exim 4 (Debian Packaging) # +###################################################################### + +###################################################################### +# /etc/exim4/exim4.conf.template is only used with the non-split +# configuration scheme. +# /etc/exim4/conf.d/main/01_exim4-config_listmacrosdefs is only used +# with the split configuration scheme. +# If you find this comment anywhere else, somebody copied it there. +# Documentation about the Debian exim4 configuration scheme can be +# found in /usr/share/doc/exim4-base/README.Debian.gz. +###################################################################### + +###################################################################### +# MAIN CONFIGURATION SETTINGS # +###################################################################### + +# Just for reference and scripts. +# On Debian systems, the main binary is installed as exim4 to avoid +# conflicts with the exim 3 packages. +exim_path = /usr/sbin/exim4 + +# Macro defining the main configuration directory. +# We do not use absolute paths. +.ifndef CONFDIR +CONFDIR = /etc/exim4 +.endif + +# debconf-driven macro definitions get inserted after this line +UPEX4CmacrosUPEX4C = 1 + +# Create domain and host lists for relay control +# '@' refers to 'the name of the local host' + +# List of domains considered local for exim. Domains not listed here +# need to be deliverable remotely. +domainlist local_domains = MAIN_LOCAL_DOMAINS + +# List of recipient domains to relay _to_. Use this list if you're - +# for example - fallback MX or mail gateway for domains. +domainlist relay_to_domains = MAIN_RELAY_TO_DOMAINS + +# List of sender networks (IP addresses) to _unconditionally_ relay +# _for_. If you intend to be SMTP AUTH server, you do not need to enter +# anything here. +hostlist relay_from_hosts = MAIN_RELAY_NETS + + +# Decide which domain to use to add to all unqualified addresses. +# If MAIN_PRIMARY_HOSTNAME_AS_QUALIFY_DOMAIN is defined, the primary +# hostname is used. If not, but MAIN_QUALIFY_DOMAIN is set, the value +# of MAIN_QUALIFY_DOMAIN is used. If both macros are not defined, +# the first line of /etc/mailname is used. +.ifndef MAIN_PRIMARY_HOSTNAME_AS_QUALIFY_DOMAIN +.ifndef MAIN_QUALIFY_DOMAIN +qualify_domain = ETC_MAILNAME +.else +qualify_domain = MAIN_QUALIFY_DOMAIN +.endif +.endif + +# listen on all all interfaces? +.ifdef MAIN_LOCAL_INTERFACES +local_interfaces = MAIN_LOCAL_INTERFACES +.endif + +.ifndef LOCAL_DELIVERY +# The default transport, set in /etc/exim4/update-exim4.conf.conf, +# defaulting to mail_spool. See CONFDIR/conf.d/transport/ for possibilities +LOCAL_DELIVERY=mail_spool +.endif + +# The gecos field in /etc/passwd holds not only the name. see passwd(5). +gecos_pattern = ^([^,:]*) +gecos_name = $1 + +# define macros to be used in acl/30_exim4-config_check_rcpt to check +# recipient local parts for strange characters. + +# This macro definition really should be in +# acl/30_exim4-config_check_rcpt but cannot be there due to +# http://www.exim.org/bugzilla/show_bug.cgi?id=101 as of exim 4.62. + +# These macros are documented in acl/30_exim4-config_check_rcpt, +# can be changed here or overridden by a locally added configuration +# file as described in README.Debian chapter 2.1.2 + +.ifndef CHECK_RCPT_LOCAL_LOCALPARTS +CHECK_RCPT_LOCAL_LOCALPARTS = ^[.] : ^.*[@%!/|`#&?] +.endif + +.ifndef CHECK_RCPT_REMOTE_LOCALPARTS +CHECK_RCPT_REMOTE_LOCALPARTS = ^[./|] : ^.*[@%!`#&?] : ^.*/\\.\\./ +.endif + +# always log tls_peerdn as we use TLS for outgoing connects by default +.ifndef MAIN_LOG_SELECTOR +MAIN_LOG_SELECTOR = +tls_peerdn +.endif +##################################################### +### end main/01_exim4-config_listmacrosdefs +##################################################### +##################################################### +### main/02_exim4-config_options +##################################################### + +### main/02_exim4-config_options +################################# + + +# Defines the access control list that is run when an +# SMTP MAIL command is received. +# +.ifndef MAIN_ACL_CHECK_MAIL +MAIN_ACL_CHECK_MAIL = acl_check_mail +.endif +acl_smtp_mail = MAIN_ACL_CHECK_MAIL + + +# Defines the access control list that is run when an +# SMTP RCPT command is received. +# +.ifndef MAIN_ACL_CHECK_RCPT +MAIN_ACL_CHECK_RCPT = acl_check_rcpt +.endif +acl_smtp_rcpt = MAIN_ACL_CHECK_RCPT + + +# Defines the access control list that is run when an +# SMTP DATA command is received. +# +.ifndef MAIN_ACL_CHECK_DATA +MAIN_ACL_CHECK_DATA = acl_check_data +.endif +acl_smtp_data = MAIN_ACL_CHECK_DATA + + +# Message size limit. The default (used when MESSAGE_SIZE_LIMIT +# is unset) is 50 MB +.ifdef MESSAGE_SIZE_LIMIT +message_size_limit = MESSAGE_SIZE_LIMIT +.endif + + +# If you are running exim4-daemon-heavy or a custom version of Exim that +# was compiled with the content-scanning extension, you can cause incoming +# messages to be automatically scanned for viruses. You have to modify the +# configuration in two places to set this up. The first of them is here, +# where you define the interface to your scanner. This example is typical +# for ClamAV; see the manual for details of what to set for other virus +# scanners. The second modification is in the acl_check_data access +# control list. + +# av_scanner = clamd:/tmp/clamd + + +# For spam scanning, there is a similar option that defines the interface to +# SpamAssassin. You do not need to set this if you are using the default, which +# is shown in this commented example. As for virus scanning, you must also +# modify the acl_check_data access control list to enable spam scanning. + +# spamd_address = 127.0.0.1 783 + +# Domain used to qualify unqualified recipient addresses +# If this option is not set, the qualify_domain value is used. +# qualify_recipient = + + +# Allow Exim to recognize addresses of the form "user@[10.11.12.13]", +# where the domain part is a "domain literal" (an IP address) instead +# of a named domain. The RFCs require this facility, but it is disabled +# in the default config since it is seldomly used and frequently abused. +# Domain literal support also needs a special router, which is automatically +# enabled if you use the enable macro MAIN_ALLOW_DOMAIN_LITERALS. +# Additionally, you might want to make your local IP addresses (or @[]) +# local domains. +.ifdef MAIN_ALLOW_DOMAIN_LITERALS +allow_domain_literals +.endif + + +# Do a reverse DNS lookup on all incoming IP calls, in order to get the +# true host name. If you feel this is too expensive, the networks for +# which a lookup is done can be listed here. +.ifndef DC_minimaldns +.ifndef MAIN_HOST_LOOKUP +MAIN_HOST_LOOKUP = * +.endif +host_lookup = MAIN_HOST_LOOKUP +.endif + + +# In a minimaldns setup, update-exim4.conf guesses the hostname and +# dumps it here to avoid DNS lookups being done at Exim run time. +.ifdef MAIN_HARDCODE_PRIMARY_HOSTNAME +primary_hostname = MAIN_HARDCODE_PRIMARY_HOSTNAME +.endif + +# The settings below, which are actually the same as the defaults in the +# code, cause Exim to make RFC 1413 (ident) callbacks for all incoming SMTP +# calls. You can limit the hosts to which these calls are made, and/or change +# the timeout that is used. If you set the timeout to zero, all RFC 1413 calls +# are disabled. RFC 1413 calls are cheap and can provide useful information +# for tracing problem messages, but some hosts and firewalls are +# misconfigured to drop the requests instead of either answering or +# rejecting them. This can result in a timeout instead of an immediate refused +# connection, leading to delays on starting up SMTP sessions. (The default was +# reduced from 30s to 5s for release 4.61.) +# rfc1413_hosts = * +# rfc1413_query_timeout = 5s + +# When using an external relay tester (such as rt.njabl.org and/or the +# currently defunct relay-test.mail-abuse.org, the test may be aborted +# since exim complains about "too many nonmail commands". If you want +# the test to complete, add the host from where "your" relay tester +# connects from to the MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS macro. +# Please note that a non-empty setting may cause extra DNS lookups to +# happen, which is the reason why this option is commented out in the +# default settings. +# MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS = !rt.njabl.org +.ifdef MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS +smtp_accept_max_nonmail_hosts = MAIN_SMTP_ACCEPT_MAX_NOMAIL_HOSTS +.endif + +# By default, exim forces a Sender: header containing the local +# account name at the local host name in all locally submitted messages +# that don't have the local account name at the local host name in the +# From: header, deletes any Sender: header present in the submitted +# message and forces the envelope sender of all locally submitted +# messages to the local account name at the local host name. +# The following settings allow local users to specify their own envelope sender +# in a locally submitted message. Sender: headers existing in a locally +# submitted message are not removed, and no automatic Sender: headers +# are added. These settings are fine for most hosts. +# If you run exim on a classical multi-user systems where all users +# have local mailboxes that can be reached via SMTP from the Internet +# with the local FQDN as the domain part of the address, you might want +# to disable the following three lines for traceability reasons. +.ifndef MAIN_FORCE_SENDER +local_from_check = false +local_sender_retain = true +untrusted_set_sender = * +.endif + + +# By default, Exim expects all envelope addresses to be fully qualified, that +# is, they must contain both a local part and a domain. Configure exim +# to accept unqualified addresses from certain hosts. When this is done, +# unqualified addresses are qualified using the settings of qualify_domain +# and/or qualify_recipient (see above). +# sender_unqualified_hosts = +# recipient_unqualified_hosts = + + +# Configure Exim to support the "percent hack" for certain domains. +# The "percent hack" is the feature by which mail addressed to x%y@z +# (where z is one of the domains listed) is locally rerouted to x@y +# and sent on. If z is not one of the "percent hack" domains, x%y is +# treated as an ordinary local part. The percent hack is rarely needed +# nowadays but frequently abused. You should not enable it unless you +# are sure that you really need it. +# percent_hack_domains = + + +# Bounce handling +.ifndef MAIN_IGNORE_BOUNCE_ERRORS_AFTER +MAIN_IGNORE_BOUNCE_ERRORS_AFTER = 2d +.endif +ignore_bounce_errors_after = MAIN_IGNORE_BOUNCE_ERRORS_AFTER + +.ifndef MAIN_TIMEOUT_FROZEN_AFTER +MAIN_TIMEOUT_FROZEN_AFTER = 7d +.endif +timeout_frozen_after = MAIN_TIMEOUT_FROZEN_AFTER + +.ifndef MAIN_FREEZE_TELL +MAIN_FREEZE_TELL = postmaster +.endif +freeze_tell = MAIN_FREEZE_TELL + + +# Define spool directory +.ifndef SPOOLDIR +SPOOLDIR = /var/spool/exim4 +.endif +spool_directory = SPOOLDIR + + +# trusted users can set envelope-from to arbitrary values +.ifndef MAIN_TRUSTED_USERS +MAIN_TRUSTED_USERS = uucp +.endif +trusted_users = MAIN_TRUSTED_USERS +.ifdef MAIN_TRUSTED_GROUPS +trusted_groups = MAIN_TRUSTED_GROUPS +.endif + + +# users in admin group can do many other things +# admin_groups = + + +# SMTP Banner. The example includes the Debian version in the SMTP dialog +# MAIN_SMTP_BANNER = "${primary_hostname} ESMTP Exim ${version_number} (Debian package MAIN_PACKAGE_VERSION) ${tod_full}" +# smtp_banner = $smtp_active_hostname ESMTP Exim $version_number $tod_full +##################################################### +### end main/02_exim4-config_options +##################################################### +##################################################### +### main/03_exim4-config_tlsoptions +##################################################### + +### main/03_exim4-config_tlsoptions +################################# + +# TLS/SSL configuration for exim as an SMTP server. +# See /usr/share/doc/exim4-base/README.Debian.gz for explanations. + +.ifdef MAIN_TLS_ENABLE +# Defines what hosts to 'advertise' STARTTLS functionality to. The +# default, *, will advertise to all hosts that connect with EHLO. +.ifndef MAIN_TLS_ADVERTISE_HOSTS +MAIN_TLS_ADVERTISE_HOSTS = * +.endif +tls_advertise_hosts = MAIN_TLS_ADVERTISE_HOSTS + + +# Full paths to Certificate and Private Key. The Private Key file +# must be kept 'secret' and should be owned by root.Debian-exim mode +# 640 (-rw-r-----). exim-gencert takes care of these prerequisites. +# Normally, exim4 looks for certificate and key in different files: +# MAIN_TLS_CERTIFICATE - path to certificate file, +# CONFDIR/exim.crt if unset +# MAIN_TLS_PRIVATEKEY - path to private key file +# CONFDIR/exim.key if unset +# You can also configure exim to look for certificate and key in the +# same file, set MAIN_TLS_CERTKEY to that file to enable. This takes +# precedence over all other settings regarding certificate and key file. +.ifdef MAIN_TLS_CERTKEY +tls_certificate = MAIN_TLS_CERTKEY +.else +.ifndef MAIN_TLS_CERTIFICATE +MAIN_TLS_CERTIFICATE = CONFDIR/exim.crt +.endif +tls_certificate = MAIN_TLS_CERTIFICATE + +.ifndef MAIN_TLS_PRIVATEKEY +MAIN_TLS_PRIVATEKEY = CONFDIR/exim.key +.endif +tls_privatekey = MAIN_TLS_PRIVATEKEY +.endif + +# Pointer to the CA Certificates against which client certificates are +# checked. This is controlled by the `tls_verify_hosts' and +# `tls_try_verify_hosts' lists below. +# If you want to check server certificates, you need to add an +# tls_verify_certificates statement to the smtp transport. +# /etc/ssl/certs/ca-certificates.crt is generated by +# the "ca-certificates" package's update-ca-certificates(8) command. +.ifndef MAIN_TLS_VERIFY_CERTIFICATES +MAIN_TLS_VERIFY_CERTIFICATES = ${if exists{/etc/ssl/certs/ca-certificates.crt}\ + {/etc/ssl/certs/ca-certificates.crt}\ + {/dev/null}} +.endif +tls_verify_certificates = MAIN_TLS_VERIFY_CERTIFICATES + + +# A list of hosts which are constrained by `tls_verify_certificates'. A host +# that matches `tls_verify_host' must present a certificate that is +# verifyable through `tls_verify_certificates' in order to be accepted as an +# SMTP client. If it does not, the connection is aborted. +.ifdef MAIN_TLS_VERIFY_HOSTS +tls_verify_hosts = MAIN_TLS_VERIFY_HOSTS +.endif + +# A weaker form of checking: if a client matches `tls_try_verify_hosts' (but +# not `tls_verify_hosts'), request a certificate and check it against +# `tls_verify_certificates' but do not abort the connection if there is no +# certificate or if the certificate presented does not match. (This +# condition can be tested for in ACLs through `verify = certificate') +# By default, this check is done for all hosts. It is known that some +# clients (including incredimail's version downloadable in February +# 2008) choke on this. To disable, set MAIN_TLS_TRY_VERIFY_HOSTS to an +# empty value. +.ifndef MAIN_TLS_TRY_VERIFY_HOSTS +MAIN_TLS_TRY_VERIFY_HOSTS = * +.endif +tls_try_verify_hosts = MAIN_TLS_TRY_VERIFY_HOSTS + +.endif +##################################################### +### end main/03_exim4-config_tlsoptions +##################################################### +##################################################### +### main/90_exim4-config_log_selector +##################################################### + +### main/90_exim4-config_log_selector +################################# + +# uncomment this for debugging +# MAIN_LOG_SELECTOR == MAIN_LOG_SELECTOR +all -subject -arguments + +.ifdef MAIN_LOG_SELECTOR +log_selector = MAIN_LOG_SELECTOR +.endif +##################################################### +### end main/90_exim4-config_log_selector +##################################################### +##################################################### +### acl/00_exim4-config_header +##################################################### + +###################################################################### +# ACL CONFIGURATION # +# Specifies access control lists for incoming SMTP mail # +###################################################################### +begin acl + + +##################################################### +### end acl/00_exim4-config_header +##################################################### +##################################################### +### acl/20_exim4-config_local_deny_exceptions +##################################################### + +### acl/20_exim4-config_local_deny_exceptions +################################# + +# This is used to determine whitelisted senders and hosts. +# It checks for CONFDIR/host_local_deny_exceptions and +# CONFDIR/sender_local_deny_exceptions. +# +# It is meant to be used from some other acl entry. +# +# See exim4-config_files(5) for details. +# +# If the files do not exist, the white list never matches, which is +# the desired behaviour. +# +# The old file names CONFDIR/local_host_whitelist and +# CONFDIR/local_sender_whitelist will continue to be honored for a +# transition period. Their use is deprecated. + +acl_local_deny_exceptions: + accept + hosts = ${if exists{CONFDIR/host_local_deny_exceptions}\ + {CONFDIR/host_local_deny_exceptions}\ + {}} + accept + senders = ${if exists{CONFDIR/sender_local_deny_exceptions}\ + {CONFDIR/sender_local_deny_exceptions}\ + {}} + accept + hosts = ${if exists{CONFDIR/local_host_whitelist}\ + {CONFDIR/local_host_whitelist}\ + {}} + accept + senders = ${if exists{CONFDIR/local_sender_whitelist}\ + {CONFDIR/local_sender_whitelist}\ + {}} + + # This hook allows you to hook in your own ACLs without having to + # modify this file. If you do it like we suggest, you'll end up with + # a small performance penalty since there is an additional file being + # accessed. This doesn't happen if you leave the macro unset. + .ifdef LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE + .include LOCAL_DENY_EXCEPTIONS_LOCAL_ACL_FILE + .endif + + # this is still supported for a transition period and is deprecated. + .ifdef WHITELIST_LOCAL_DENY_LOCAL_ACL_FILE + .include WHITELIST_LOCAL_DENY_LOCAL_ACL_FILE + .endif +##################################################### +### end acl/20_exim4-config_local_deny_exceptions +##################################################### +##################################################### +### acl/30_exim4-config_check_mail +##################################################### + +### acl/30_exim4-config_check_mail +################################# + +# This access control list is used for every MAIL command in an incoming +# SMTP message. The tests are run in order until the address is either +# accepted or denied. +# +acl_check_mail: + .ifdef CHECK_MAIL_HELO_ISSUED + deny + message = no HELO given before MAIL command + condition = ${if def:sender_helo_name {no}{yes}} + .endif + + accept +##################################################### +### end acl/30_exim4-config_check_mail +##################################################### +##################################################### +### acl/30_exim4-config_check_rcpt +##################################################### + +### acl/30_exim4-config_check_rcpt +################################# + +# This access control list is used for every RCPT command in an incoming +# SMTP message. The tests are run in order until the address is either +# accepted or denied. +# +acl_check_rcpt: + + # Accept if the source is local SMTP (i.e. not over TCP/IP). We do this by + # testing for an empty sending host field. + accept + hosts = : + + + # The following section of the ACL is concerned with local parts that contain + # certain non-alphanumeric characters. Dots in unusual places are + # handled by this ACL as well. + # + # Non-alphanumeric characters other than dots are rarely found in genuine + # local parts, but are often tried by people looking to circumvent + # relaying restrictions. Therefore, although they are valid in local + # parts, these rules disallow certain non-alphanumeric characters, as + # a precaution. + # + # Empty components (two dots in a row) are not valid in RFC 2822, but Exim + # allows them because they have been encountered. (Consider local parts + # constructed as "firstinitial.secondinitial.familyname" when applied to + # a name without a second initial.) However, a local part starting + # with a dot or containing /../ can cause trouble if it is used as part of a + # file name (e.g. for a mailing list). This is also true for local parts that + # contain slashes. A pipe symbol can also be troublesome if the local part is + # incorporated unthinkingly into a shell command line. + # + # These ACL components will block recipient addresses that are valid + # from an RFC2822 point of view. We chose to have them blocked by + # default for security reasons. + # + # If you feel that your site should have less strict recipient + # checking, please feel free to change the default values of the macros + # defined in main/01_exim4-config_listmacrosdefs or override them from a + # local configuration file. + # + # Two different rules are used. The first one has a quite strict + # default, and is applied to messages that are addressed to one of the + # local domains handled by this host. + + # The default value of CHECK_RCPT_LOCAL_LOCALPARTS is defined in + # main/01_exim4-config_listmacrosdefs: + # CHECK_RCPT_LOCAL_LOCALPARTS = ^[.] : ^.*[@%!/|`#&?] + # This blocks local parts that begin with a dot or contain a quite + # broad range of non-alphanumeric characters. + .ifdef CHECK_RCPT_LOCAL_LOCALPARTS + deny + domains = +local_domains + local_parts = CHECK_RCPT_LOCAL_LOCALPARTS + message = restricted characters in address + .endif + + + # The second rule applies to all other domains, and its default is + # considerably less strict. + + # The default value of CHECK_RCPT_REMOTE_LOCALPARTS is defined in + # main/01_exim4-config_listmacrosdefs: + # CHECK_RCPT_REMOTE_LOCALPARTS = ^[./|] : ^.*[@%!`#&?] : ^.*/\\.\\./ + + # It allows local users to send outgoing messages to sites + # that use slashes and vertical bars in their local parts. It blocks + # local parts that begin with a dot, slash, or vertical bar, but allows + # these characters within the local part. However, the sequence /../ is + # barred. The use of some other non-alphanumeric characters is blocked. + # Single quotes might probably be dangerous as well, but they're + # allowed by the default regexps to avoid rejecting mails to Ireland. + # The motivation here is to prevent local users (or local users' malware) + # from mounting certain kinds of attack on remote sites. + .ifdef CHECK_RCPT_REMOTE_LOCALPARTS + deny + domains = !+local_domains + local_parts = CHECK_RCPT_REMOTE_LOCALPARTS + message = restricted characters in address + .endif + + + # Accept mail to postmaster in any local domain, regardless of the source, + # and without verifying the sender. + # + accept + .ifndef CHECK_RCPT_POSTMASTER + local_parts = postmaster + .else + local_parts = CHECK_RCPT_POSTMASTER + .endif + domains = +local_domains : +relay_to_domains + + + # Deny unless the sender address can be verified. + # + # This is disabled by default so that DNSless systems don't break. If + # your system can do DNS lookups without delay or cost, you might want + # to enable this feature. + # + # This feature does not work in smarthost and satellite setups as + # with these setups all domains pass verification. See spec.txt chapter + # 39.31 with the added information that a smarthost/satellite setup + # routes all non-local e-mail to the smarthost. + .ifdef CHECK_RCPT_VERIFY_SENDER + deny + message = Sender verification failed + !acl = acl_local_deny_exceptions + !verify = sender + .endif + + # Verify senders listed in local_sender_callout with a callout. + # + # In smarthost and satellite setups, this causes the callout to be + # done to the smarthost. Verification will thus only be reliable if the + # smarthost does reject illegal addresses in the SMTP dialog. + deny + !acl = acl_local_deny_exceptions + senders = ${if exists{CONFDIR/local_sender_callout}\ + {CONFDIR/local_sender_callout}\ + {}} + !verify = sender/callout + + + # Accept if the message comes from one of the hosts for which we are an + # outgoing relay. It is assumed that such hosts are most likely to be MUAs, + # so we set control=submission to make Exim treat the message as a + # submission. It will fix up various errors in the message, for example, the + # lack of a Date: header line. If you are actually relaying out out from + # MTAs, you may want to disable this. If you are handling both relaying from + # MTAs and submissions from MUAs you should probably split them into two + # lists, and handle them differently. + + # Recipient verification is omitted here, because in many cases the clients + # are dumb MUAs that don't cope well with SMTP error responses. If you are + # actually relaying out from MTAs, you should probably add recipient + # verification here. + + # Note that, by putting this test before any DNS black list checks, you will + # always accept from these hosts, even if they end up on a black list. The + # assumption is that they are your friends, and if they get onto black + # list, it is a mistake. + accept + hosts = +relay_from_hosts + control = submission/sender_retain + + + # Accept if the message arrived over an authenticated connection, from + # any host. Again, these messages are usually from MUAs, so recipient + # verification is omitted, and submission mode is set. And again, we do this + # check before any black list tests. + accept + authenticated = * + control = submission/sender_retain + + + # Insist that any other recipient address that we accept is either in one of + # our local domains, or is in a domain for which we explicitly allow + # relaying. Any other domain is rejected as being unacceptable for relaying. + require + message = relay not permitted + domains = +local_domains : +relay_to_domains + + + # We also require all accepted addresses to be verifiable. This check will + # do local part verification for local domains, but only check the domain + # for remote domains. + require + verify = recipient + + + # Verify recipients listed in local_rcpt_callout with a callout. + # This is especially handy for forwarding MX hosts (secondary MX or + # mail hubs) of domains that receive a lot of spam to non-existent + # addresses. The only way to check local parts for remote relay + # domains is to use a callout (add /callout), but please read the + # documentation about callouts before doing this. + deny + !acl = acl_local_deny_exceptions + recipients = ${if exists{CONFDIR/local_rcpt_callout}\ + {CONFDIR/local_rcpt_callout}\ + {}} + !verify = recipient/callout + + + # CONFDIR/local_sender_blacklist holds a list of envelope senders that + # should have their access denied to the local host. Incoming messages + # with one of these senders are rejected at RCPT time. + # + # The explicit white lists are honored as well as negative items in + # the black list. See exim4-config_files(5) for details. + deny + message = sender envelope address $sender_address is locally blacklisted here. If you think this is wrong, get in touch with postmaster + !acl = acl_local_deny_exceptions + senders = ${if exists{CONFDIR/local_sender_blacklist}\ + {CONFDIR/local_sender_blacklist}\ + {}} + + + # deny bad sites (IP address) + # CONFDIR/local_host_blacklist holds a list of host names, IP addresses + # and networks (CIDR notation) that should have their access denied to + # The local host. Messages coming in from a listed host will have all + # RCPT statements rejected. + # + # The explicit white lists are honored as well as negative items in + # the black list. See exim4-config_files(5) for details. + deny + message = sender IP address $sender_host_address is locally blacklisted here. If you think this is wrong, get in touch with postmaster + !acl = acl_local_deny_exceptions + hosts = ${if exists{CONFDIR/local_host_blacklist}\ + {CONFDIR/local_host_blacklist}\ + {}} + + + # Warn if the sender host does not have valid reverse DNS. + # + # If your system can do DNS lookups without delay or cost, you might want + # to enable this. + # If sender_host_address is defined, it's a remote call. If + # sender_host_name is not defined, then reverse lookup failed. Use + # this instead of !verify = reverse_host_lookup to catch deferrals + # as well as outright failures. + .ifdef CHECK_RCPT_REVERSE_DNS + warn + message = X-Host-Lookup-Failed: Reverse DNS lookup failed for $sender_host_address (${if eq{$host_lookup_failed}{1}{failed}{deferred}}) + condition = ${if and{{def:sender_host_address}{!def:sender_host_name}}\ + {yes}{no}} + .endif + + + # Use spfquery to perform a pair of SPF checks (for details, see + # http://www.openspf.org/) + # + # This is quite costly in terms of DNS lookups (~6 lookups per mail). Do not + # enable if that's an issue. Also note that if you enable this, you must + # install "libmail-spf-query-perl" which provides the spfquery command. + # Missing libmail-spf-query-perl will trigger the "Unexpected error in + # SPF check" warning. + .ifdef CHECK_RCPT_SPF + deny + message = [SPF] $sender_host_address is not allowed to send mail from ${if def:sender_address_domain {$sender_address_domain}{$sender_helo_name}}. \ + Please see http://www.openspf.org/Why?scope=${if def:sender_address_domain {mfrom}{helo}};identity=${if def:sender_address_domain {$sender_address}{$sender_helo_name}};ip=$sender_host_address + log_message = SPF check failed. + !acl = acl_local_deny_exceptions + condition = ${run{/usr/bin/spfquery --ip \"$sender_host_address\" --mail-from \"$sender_address\" --helo \"$sender_helo_name\"}\ + {no}{${if eq {$runrc}{1}{yes}{no}}}} + + defer + message = Temporary DNS error while checking SPF record. Try again later. + condition = ${if eq {$runrc}{5}{yes}{no}} + + warn + message = Received-SPF: ${if eq {$runrc}{0}{pass}{${if eq {$runrc}{2}{softfail}\ + {${if eq {$runrc}{3}{neutral}{${if eq {$runrc}{4}{unknown}{${if eq {$runrc}{6}{none}{error}}}}}}}}}} + condition = ${if <={$runrc}{6}{yes}{no}} + + warn + log_message = Unexpected error in SPF check. + condition = ${if >{$runrc}{6}{yes}{no}} + + # Support for best-guess (see http://www.openspf.org/developers-guide.html) + warn + message = X-SPF-Guess: ${run{/usr/bin/spfquery --ip \"$sender_host_address\" --mail-from \"$sender_address\" \ --helo \"$sender_helo_name\" --guess true}\ + {pass}{${if eq {$runrc}{2}{softfail}{${if eq {$runrc}{3}{neutral}{${if eq {$runrc}{4}{unknown}\ + {${if eq {$runrc}{6}{none}{error}}}}}}}}}} + condition = ${if <={$runrc}{6}{yes}{no}} + + defer + message = Temporary DNS error while checking SPF record. Try again later. + condition = ${if eq {$runrc}{5}{yes}{no}} + .endif + + + # Check against classic DNS "black" lists (DNSBLs) which list + # sender IP addresses + .ifdef CHECK_RCPT_IP_DNSBLS + warn + message = X-Warning: $sender_host_address is listed at $dnslist_domain ($dnslist_value: $dnslist_text) + log_message = $sender_host_address is listed at $dnslist_domain ($dnslist_value: $dnslist_text) + dnslists = CHECK_RCPT_IP_DNSBLS + .endif + + + # Check against DNSBLs which list sender domains, with an option to locally + # whitelist certain domains that might be blacklisted. + # + # Note: If you define CHECK_RCPT_DOMAIN_DNSBLS, you must append + # "/$sender_address_domain" after each domain. For example: + # CHECK_RCPT_DOMAIN_DNSBLS = rhsbl.foo.org/$sender_address_domain \ + # : rhsbl.bar.org/$sender_address_domain + .ifdef CHECK_RCPT_DOMAIN_DNSBLS + warn + message = X-Warning: $sender_address_domain is listed at $dnslist_domain ($dnslist_value: $dnslist_text) + log_message = $sender_address_domain is listed at $dnslist_domain ($dnslist_value: $dnslist_text) + !senders = ${if exists{CONFDIR/local_domain_dnsbl_whitelist}\ + {CONFDIR/local_domain_dnsbl_whitelist}\ + {}} + dnslists = CHECK_RCPT_DOMAIN_DNSBLS + .endif + + + # This hook allows you to hook in your own ACLs without having to + # modify this file. If you do it like we suggest, you'll end up with + # a small performance penalty since there is an additional file being + # accessed. This doesn't happen if you leave the macro unset. + .ifdef CHECK_RCPT_LOCAL_ACL_FILE + .include CHECK_RCPT_LOCAL_ACL_FILE + .endif + + + ############################################################################# + # This check is commented out because it is recognized that not every + # sysadmin will want to do it. If you enable it, the check performs + # Client SMTP Authorization (csa) checks on the sending host. These checks + # do DNS lookups for SRV records. The CSA proposal is currently (May 2005) + # an Internet draft. You can, of course, add additional conditions to this + # ACL statement to restrict the CSA checks to certain hosts only. + # + # require verify = csa + ############################################################################# + + + # Accept if the address is in a domain for which we are an incoming relay, + # but again, only if the recipient can be verified. + + accept + domains = +relay_to_domains + endpass + verify = recipient + + + # At this point, the address has passed all the checks that have been + # configured, so we accept it unconditionally. + + accept +##################################################### +### end acl/30_exim4-config_check_rcpt +##################################################### +##################################################### +### acl/40_exim4-config_check_data +##################################################### + +### acl/40_exim4-config_check_data +################################# + +# This ACL is used after the contents of a message have been received. This +# is the ACL in which you can test a message's headers or body, and in +# particular, this is where you can invoke external virus or spam scanners. + +acl_check_data: + + # Deny unless the address list headers are syntactically correct. + # + # If you enable this, you might reject legitimate mail. + .ifdef CHECK_DATA_VERIFY_HEADER_SYNTAX + deny + message = Message headers fail syntax check + !acl = acl_local_deny_exceptions + !verify = header_syntax + .endif + + + # require that there is a verifiable sender address in at least + # one of the "Sender:", "Reply-To:", or "From:" header lines. + .ifdef CHECK_DATA_VERIFY_HEADER_SENDER + deny + message = No verifiable sender address in message headers + !acl = acl_local_deny_exceptions + !verify = header_sender + .endif + + + # Deny if the message contains malware. Before enabling this check, you + # must install a virus scanner and set the av_scanner option in the + # main configuration. + # + # exim4-daemon-heavy must be used for this section to work. + # + # deny + # malware = * + # message = This message was detected as possible malware ($malware_name). + + + # Add headers to a message if it is judged to be spam. Before enabling this, + # you must install SpamAssassin. You also need to set the spamd_address + # option in the main configuration. + # + # exim4-daemon-heavy must be used for this section to work. + # + # Please note that this is only suiteable as an example. There are + # multiple issues with this configuration method. For example, if you go + # this way, you'll give your spamassassin daemon write access to the + # entire exim spool which might be a security issue in case of a + # spamassassin exploit. + # + # See the exim docs and the exim wiki for more suitable examples. + # + # warn + # spam = Debian-exim:true + # message = X-Spam_score: $spam_score\n\ + # X-Spam_score_int: $spam_score_int\n\ + # X-Spam_bar: $spam_bar\n\ + # X-Spam_report: $spam_report + + + # This hook allows you to hook in your own ACLs without having to + # modify this file. If you do it like we suggest, you'll end up with + # a small performance penalty since there is an additional file being + # accessed. This doesn't happen if you leave the macro unset. + .ifdef CHECK_DATA_LOCAL_ACL_FILE + .include CHECK_DATA_LOCAL_ACL_FILE + .endif + + + # accept otherwise + accept +##################################################### +### end acl/40_exim4-config_check_data +##################################################### +##################################################### +### router/00_exim4-config_header +##################################################### + +###################################################################### +# ROUTERS CONFIGURATION # +# Specifies how addresses are handled # +###################################################################### +# THE ORDER IN WHICH THE ROUTERS ARE DEFINED IS IMPORTANT! # +# An address is passed to each router in turn until it is accepted. # +###################################################################### + +begin routers + +##################################################### +### end router/00_exim4-config_header +##################################################### +##################################################### +### router/100_exim4-config_domain_literal +##################################################### + +### router/100_exim4-config_domain_literal +################################# + +# This router handles e-mail addresses in "domain literal" form like +# . The RFCs require this facility, but it is disabled +# in the default config since it is seldomly used and frequently abused. +# Domain literal support also needs to be enabled in the main config, +# which is automatically done if you use the enable macro +# MAIN_ALLOW_DOMAIN_LITERALS. + +.ifdef MAIN_ALLOW_DOMAIN_LITERALS +domain_literal: + debug_print = "R: domain_literal for $local_part@$domain" + driver = ipliteral + domains = ! +local_domains + transport = remote_smtp +.endif +##################################################### +### end router/100_exim4-config_domain_literal +##################################################### +##################################################### +### router/150_exim4-config_hubbed_hosts +##################################################### + +# router/150_exim4-config_hubbed_hosts +################################# + +# route specific domains manually. +# +# see exim4-config_files(5) and spec.txt chapter 20.3 through 20.7 for +# more detailed documentation. + +hubbed_hosts: + debug_print = "R: hubbed_hosts for $domain" + driver = manualroute + domains = "${if exists{CONFDIR/hubbed_hosts}\ + {partial-lsearch;CONFDIR/hubbed_hosts}\ + fail}" + same_domain_copy_routing = yes + route_data = ${lookup{$domain}partial-lsearch{CONFDIR/hubbed_hosts}} + transport = remote_smtp +##################################################### +### end router/150_exim4-config_hubbed_hosts +##################################################### +##################################################### +### router/200_exim4-config_primary +##################################################### + +### router/200_exim4-config_primary +################################# +# This file holds the primary router, responsible for nonlocal mails + +.ifdef DCconfig_internet +# configtype=internet +# +# deliver mail to the recipient if recipient domain is a domain we +# relay for. We do not ignore any target hosts here since delivering to +# a site local or even a link local address might be wanted here, and if +# such an address has found its way into the MX record of such a domain, +# the local admin is probably in a place where that broken MX record +# could be fixed. + +dnslookup_relay_to_domains: + debug_print = "R: dnslookup_relay_to_domains for $local_part@$domain" + driver = dnslookup + domains = ! +local_domains : +relay_to_domains + transport = remote_smtp + same_domain_copy_routing = yes + no_more + +# deliver mail directly to the recipient. This router is only reached +# for domains that we do not relay for. Since we most probably can't +# have broken MX records pointing to site local or link local IP +# addresses fixed, we ignore target hosts pointing to these addresses. + +dnslookup: + debug_print = "R: dnslookup for $local_part@$domain" + driver = dnslookup + domains = ! +local_domains + transport = remote_smtp + same_domain_copy_routing = yes + # ignore private rfc1918 and APIPA addresses + ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8 : 192.168.0.0/16 :\ + 172.16.0.0/12 : 10.0.0.0/8 : 169.254.0.0/16 :\ + 255.255.255.255 + no_more + +.endif + + +.ifdef DCconfig_local +# configtype=local +# +# Stand-alone system, so generate an error for mail to a non-local domain +nonlocal: + debug_print = "R: nonlocal for $local_part@$domain" + driver = redirect + domains = ! +local_domains + allow_fail + data = :fail: Mailing to remote domains not supported + no_more + +.endif + + +.ifdef DCconfig_smarthost DCconfig_satellite +# configtype=smarthost or configtype=satellite +# +# Send all non-local mail to a single other machine (smarthost). +# +# This means _ALL_ non-local mail goes to the smarthost. This will most +# probably not do what you want for domains that are listed in +# relay_domains. The most typical use for relay_domains is to control +# relaying for incoming e-mail on secondary MX hosts. In that case, +# it doesn't make sense to send the mail to the smarthost since the +# smarthost will probably send the message right back here, causing a +# loop. +# +# If you want to use a smarthost while being secondary MX for some +# domains, you'll need to copy the dnslookup_relay_to_domains router +# here so that mail to relay_domains is handled separately. + +smarthost: + debug_print = "R: smarthost for $local_part@$domain" + driver = manualroute + domains = ! +local_domains + transport = remote_smtp_smarthost + route_list = * DCsmarthost byname + host_find_failed = defer + same_domain_copy_routing = yes + no_more + +.endif + + +# The "no_more" above means that all later routers are for +# domains in the local_domains list, i.e. just like Exim 3 directors. +##################################################### +### end router/200_exim4-config_primary +##################################################### +##################################################### +### router/300_exim4-config_real_local +##################################################### + +### router/300_exim4-config_real_local +################################# + +# This router allows reaching a local user while avoiding local +# processing. This can be used to inform a user of a broken .forward +# file, for example. The userforward router does this. + +COND_LOCAL_SUBMITTER = "\ + ${if match_ip{$sender_host_address}{:@[]}\ + {1}{0}\ + }" + +real_local: + debug_print = "R: real_local for $local_part@$domain" + driver = accept + domains = +local_domains + condition = COND_LOCAL_SUBMITTER + local_part_prefix = real- + check_local_user + transport = LOCAL_DELIVERY + +##################################################### +### end router/300_exim4-config_real_local +##################################################### +##################################################### +### router/400_exim4-config_system_aliases +##################################################### + +### router/400_exim4-config_system_aliases +################################# + +# This router handles aliasing using a traditional /etc/aliases file. +# +##### NB You must ensure that /etc/aliases exists. It used to be the case +##### NB that every Unix had that file, because it was the Sendmail default. +##### NB These days, there are systems that don't have it. Your aliases +##### NB file should at least contain an alias for "postmaster". +# +# This router handles the local part in a case-insensitive way which +# satisfies the RFCs requirement that postmaster be reachable regardless +# of case. If you decide to handle /etc/aliases in a caseful way, you +# need to make arrangements for a caseless postmaster. +# +# Delivery to arbitrary directories, files, and piping to programs in +# /etc/aliases is disabled per default. +# If that is a problem for you, see +# /usr/share/doc/exim4-base/README.Debian.gz +# for explanation and some workarounds. + +system_aliases: + debug_print = "R: system_aliases for $local_part@$domain" + driver = redirect + domains = +local_domains + allow_fail + allow_defer + data = ${lookup{$local_part}lsearch{/etc/aliases}} + .ifdef SYSTEM_ALIASES_USER + user = SYSTEM_ALIASES_USER + .endif + .ifdef SYSTEM_ALIASES_GROUP + group = SYSTEM_ALIASES_GROUP + .endif + .ifdef SYSTEM_ALIASES_FILE_TRANSPORT + file_transport = SYSTEM_ALIASES_FILE_TRANSPORT + .endif + .ifdef SYSTEM_ALIASES_PIPE_TRANSPORT + pipe_transport = SYSTEM_ALIASES_PIPE_TRANSPORT + .endif + .ifdef SYSTEM_ALIASES_DIRECTORY_TRANSPORT + directory_transport = SYSTEM_ALIASES_DIRECTORY_TRANSPORT + .endif +##################################################### +### end router/400_exim4-config_system_aliases +##################################################### +##################################################### +### router/500_exim4-config_hubuser +##################################################### + +### router/500_exim4-config_hubuser +################################# + +.ifdef DCconfig_satellite +# This router is only used for configtype=satellite. +# It takes care to route all mail targetted to +# to the host where we read our mail +# +hub_user: + debug_print = "R: hub_user for $local_part@$domain" + driver = redirect + domains = +local_domains + data = ${local_part}@DCreadhost + check_local_user + +# Grab the redirected mail and deliver it. +# This is a duplicate of the smarthost router, needed because +# DCreadhost might end up as part of +local_domains +hub_user_smarthost: + debug_print = "R: hub_user_smarthost for $local_part@$domain" + driver = manualroute + domains = DCreadhost + transport = remote_smtp_smarthost + route_list = * DCsmarthost byname + host_find_failed = defer + same_domain_copy_routing = yes + check_local_user +.endif + + +##################################################### +### end router/500_exim4-config_hubuser +##################################################### +##################################################### +### router/600_exim4-config_userforward +##################################################### + +### router/600_exim4-config_userforward +################################# + +# This router handles forwarding using traditional .forward files in users' +# home directories. It also allows mail filtering with a forward file +# starting with the string "# Exim filter" or "# Sieve filter". +# +# The no_verify setting means that this router is skipped when Exim is +# verifying addresses. Similarly, no_expn means that this router is skipped if +# Exim is processing an EXPN command. +# +# The check_ancestor option means that if the forward file generates an +# address that is an ancestor of the current one, the current one gets +# passed on instead. This covers the case where A is aliased to B and B +# has a .forward file pointing to A. +# +# The four transports specified at the end are those that are used when +# forwarding generates a direct delivery to a directory, or a file, or to a +# pipe, or sets up an auto-reply, respectively. +# +userforward: + debug_print = "R: userforward for $local_part@$domain" + driver = redirect + domains = +local_domains + check_local_user + file = $home/.forward + require_files = $local_part:$home/.forward + no_verify + no_expn + check_ancestor + allow_filter + forbid_smtp_code = true + directory_transport = address_directory + file_transport = address_file + pipe_transport = address_pipe + reply_transport = address_reply + skip_syntax_errors + syntax_errors_to = real-$local_part@$domain + syntax_errors_text = \ + This is an automatically generated message. An error has\n\ + been found in your .forward file. Details of the error are\n\ + reported below. While this error persists, you will receive\n\ + a copy of this message for every message that is addressed\n\ + to you. If your .forward file is a filter file, or if it is\n\ + a non-filter file containing no valid forwarding addresses,\n\ + a copy of each incoming message will be put in your normal\n\ + mailbox. If a non-filter file contains at least one valid\n\ + forwarding address, forwarding to the valid addresses will\n\ + happen, and those will be the only deliveries that occur. + +##################################################### +### end router/600_exim4-config_userforward +##################################################### +##################################################### +### router/700_exim4-config_procmail +##################################################### + +procmail: + debug_print = "R: procmail for $local_part@$domain" + driver = accept + domains = +local_domains + check_local_user + transport = procmail_pipe + # emulate OR with "if exists"-expansion + require_files = ${local_part}:\ + ${if exists{/etc/procmailrc}\ + {/etc/procmailrc}{${home}/.procmailrc}}:\ + +/usr/bin/procmail + no_verify + no_expn + +##################################################### +### end router/700_exim4-config_procmail +##################################################### +##################################################### +### router/800_exim4-config_maildrop +##################################################### + +### router/800_exim4-config_maildrop +################################# + +maildrop: + debug_print = "R: maildrop for $local_part@$domain" + driver = accept + domains = +local_domains + check_local_user + transport = maildrop_pipe + require_files = ${local_part}:${home}/.mailfilter:+/usr/bin/maildrop + no_verify + no_expn + +##################################################### +### end router/800_exim4-config_maildrop +##################################################### +##################################################### +### router/850_exim4-config_lowuid +##################################################### + +### router/850_exim4-config_lowuid +################################# + +.ifndef FIRST_USER_ACCOUNT_UID +FIRST_USER_ACCOUNT_UID = 0 +.endif + +.ifndef DEFAULT_SYSTEM_ACCOUNT_ALIAS +DEFAULT_SYSTEM_ACCOUNT_ALIAS = :fail: no mail to system accounts +.endif + +COND_SYSTEM_USER_AND_REMOTE_SUBMITTER = "\ + ${if and{{! match_ip{$sender_host_address}{:@[]}}\ + {<{$local_user_uid}{FIRST_USER_ACCOUNT_UID}}}\ + {1}{0}\ + }" + +lowuid_aliases: + debug_print = "R: lowuid_aliases for $local_part@$domain (UID $local_user_uid)" + check_local_user + driver = redirect + allow_fail + domains = +local_domains + condition = COND_SYSTEM_USER_AND_REMOTE_SUBMITTER + data = ${if exists{/etc/exim4/lowuid-aliases}\ + {${lookup{$local_part}lsearch{/etc/exim4/lowuid-aliases}\ + {$value}{DEFAULT_SYSTEM_ACCOUNT_ALIAS}}}{DEFAULT_SYSTEM_ACCOUNT_ALIAS}} +##################################################### +### end router/850_exim4-config_lowuid +##################################################### +##################################################### +### router/900_exim4-config_local_user +##################################################### + +### router/900_exim4-config_local_user +################################# + +# This router matches local user mailboxes. If the router fails, the error +# message is "Unknown user". + +local_user: + debug_print = "R: local_user for $local_part@$domain" + driver = accept + domains = +local_domains + check_local_user + local_parts = ! root + transport = LOCAL_DELIVERY + cannot_route_message = Unknown user +##################################################### +### end router/900_exim4-config_local_user +##################################################### +##################################################### +### router/mmm_mail4root +##################################################### + +### router/mmm_mail4root +################################# +# deliver mail addressed to root to /var/mail/mail as user mail:mail +# if it was not redirected in /etc/aliases or by other means +# Exim cannot deliver as root since 4.24 (FIXED_NEVER_USERS) + +mail4root: + debug_print = "R: mail4root for $local_part@$domain" + driver = redirect + domains = +local_domains + data = /var/mail/mail + file_transport = address_file + local_parts = root + user = mail + group = mail + +##################################################### +### end router/mmm_mail4root +##################################################### +##################################################### +### transport/00_exim4-config_header +##################################################### + +###################################################################### +# TRANSPORTS CONFIGURATION # +###################################################################### +# ORDER DOES NOT MATTER # +# Only one appropriate transport is called for each delivery. # +###################################################################### + +# A transport is used only when referenced from a router that successfully +# handles an address. + +begin transports + +##################################################### +### end transport/00_exim4-config_header +##################################################### +##################################################### +### transport/10_exim4-config_transport-macros +##################################################### + +### transport/10_exim4-config_transport-macros +################################# + +.ifdef HIDE_MAILNAME +REMOTE_SMTP_HEADERS_REWRITE=*@+local_domains $1@DCreadhost frs : *@ETC_MAILNAME $1@DCreadhost frs +REMOTE_SMTP_RETURN_PATH=${if match_domain{$sender_address_domain}{+local_domains}{${sender_address_local_part}@DCreadhost}{${if match_domain{$sender_address_domain}{ETC_MAILNAME}{${sender_address_local_part}@DCreadhost}fail}}} +.endif + +.ifdef REMOTE_SMTP_HELO_FROM_DNS +REMOTE_SMTP_HELO_DATA=${lookup dnsdb {ptr=$sending_ip_address}{$value}{$primary_hostname}} +.endif +##################################################### +### end transport/10_exim4-config_transport-macros +##################################################### +##################################################### +### transport/30_exim4-config_address_file +##################################################### + +# This transport is used for handling deliveries directly to files that are +# generated by aliasing or forwarding. +# +address_file: + debug_print = "T: address_file for $local_part@$domain" + driver = appendfile + delivery_date_add + envelope_to_add + return_path_add + +##################################################### +### end transport/30_exim4-config_address_file +##################################################### +##################################################### +### transport/30_exim4-config_address_pipe +##################################################### + +# This transport is used for handling pipe deliveries generated by +# .forward files. If the commands fails and produces any output on standard +# output or standard error streams, the output is returned to the sender +# of the message as a delivery error. +address_pipe: + debug_print = "T: address_pipe for $local_part@$domain" + driver = pipe + return_fail_output + +##################################################### +### end transport/30_exim4-config_address_pipe +##################################################### +##################################################### +### transport/30_exim4-config_address_reply +##################################################### + +# This transport is used for handling autoreplies generated by the filtering +# option of the userforward router. +# +address_reply: + debug_print = "T: autoreply for $local_part@$domain" + driver = autoreply + +##################################################### +### end transport/30_exim4-config_address_reply +##################################################### +##################################################### +### transport/30_exim4-config_mail_spool +##################################################### + +### transport/30_exim4-config_mail_spool + +# This transport is used for local delivery to user mailboxes in traditional +# BSD mailbox format. +# +mail_spool: + debug_print = "T: appendfile for $local_part@$domain" + driver = appendfile + file = /var/mail/$local_part + delivery_date_add + envelope_to_add + return_path_add + group = mail + mode = 0660 + mode_fail_narrower = false + +##################################################### +### end transport/30_exim4-config_mail_spool +##################################################### +##################################################### +### transport/30_exim4-config_maildir_home +##################################################### + +### transport/30_exim4-config_maildir_home +################################# + +# Use this instead of mail_spool if you want to to deliver to Maildir in +# home-directory - change the definition of LOCAL_DELIVERY +# +maildir_home: + debug_print = "T: maildir_home for $local_part@$domain" + driver = appendfile + .ifdef MAILDIR_HOME_MAILDIR_LOCATION + directory = MAILDIR_HOME_MAILDIR_LOCATION + .else + directory = $home/Maildir + .endif + .ifdef MAILDIR_HOME_CREATE_DIRECTORY + create_directory + .endif + .ifdef MAILDIR_HOME_CREATE_FILE + create_file = MAILDIR_HOME_CREATE_FILE + .endif + delivery_date_add + envelope_to_add + return_path_add + maildir_format + .ifdef MAILDIR_HOME_DIRECTORY_MODE + directory_mode = MAILDIR_HOME_DIRECTORY_MODE + .else + directory_mode = 0700 + .endif + .ifdef MAILDIR_HOME_MODE + mode = MAILDIR_HOME_MODE + .else + mode = 0600 + .endif + mode_fail_narrower = false + # This transport always chdirs to $home before trying to deliver. If + # $home is not accessible, this chdir fails and prevents delivery. + # If you are in a setup where home directories might not be + # accessible, uncomment the current_directory line below. + # current_directory = / +##################################################### +### end transport/30_exim4-config_maildir_home +##################################################### +##################################################### +### transport/30_exim4-config_maildrop_pipe +##################################################### + +maildrop_pipe: + debug_print = "T: maildrop_pipe for $local_part@$domain" + driver = pipe + path = "/bin:/usr/bin:/usr/local/bin" + command = "/usr/bin/maildrop" + return_path_add + delivery_date_add + envelope_to_add + +##################################################### +### end transport/30_exim4-config_maildrop_pipe +##################################################### +##################################################### +### transport/30_exim4-config_procmail_pipe +##################################################### + +procmail_pipe: + debug_print = "T: procmail_pipe for $local_part@$domain" + driver = pipe + path = "/bin:/usr/bin:/usr/local/bin" + command = "/usr/bin/procmail" + return_path_add + delivery_date_add + envelope_to_add + +##################################################### +### end transport/30_exim4-config_procmail_pipe +##################################################### +##################################################### +### transport/30_exim4-config_remote_smtp +##################################################### + +### transport/30_exim4-config_remote_smtp +################################# +# This transport is used for delivering messages over SMTP connections. + +remote_smtp: + debug_print = "T: remote_smtp for $local_part@$domain" + driver = smtp +.ifdef REMOTE_SMTP_HOSTS_AVOID_TLS + hosts_avoid_tls = REMOTE_SMTP_HOSTS_AVOID_TLS +.endif +.ifdef REMOTE_SMTP_HEADERS_REWRITE + headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE +.endif +.ifdef REMOTE_SMTP_RETURN_PATH + return_path = REMOTE_SMTP_RETURN_PATH +.endif +.ifdef REMOTE_SMTP_HELO_FROM_DNS + helo_data=REMOTE_SMTP_HELO_DATA +.endif +##################################################### +### end transport/30_exim4-config_remote_smtp +##################################################### +##################################################### +### transport/30_exim4-config_remote_smtp_smarthost +##################################################### + +### transport/30_exim4-config_remote_smtp_smarthost +################################# + +# This transport is used for delivering messages over SMTP connections +# to a smarthost. The local host tries to authenticate. +# This transport is used for smarthost and satellite configurations. + +remote_smtp_smarthost: + debug_print = "T: remote_smtp_smarthost for $local_part@$domain" + driver = smtp + hosts_try_auth = <; ${if exists{CONFDIR/passwd.client} \ + {\ + ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$host_address}}\ + }\ + {} \ + } +.ifdef REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS + hosts_avoid_tls = REMOTE_SMTP_SMARTHOST_HOSTS_AVOID_TLS +.endif +.ifdef REMOTE_SMTP_HEADERS_REWRITE + headers_rewrite = REMOTE_SMTP_HEADERS_REWRITE +.endif +.ifdef REMOTE_SMTP_RETURN_PATH + return_path = REMOTE_SMTP_RETURN_PATH +.endif +.ifdef REMOTE_SMTP_HELO_FROM_DNS + helo_data=REMOTE_SMTP_HELO_DATA +.endif +##################################################### +### end transport/30_exim4-config_remote_smtp_smarthost +##################################################### +##################################################### +### transport/35_exim4-config_address_directory +##################################################### +# This transport is used for handling file addresses generated by alias +# or .forward files if the path ends in "/", which causes it to be treated +# as a directory name rather than a file name. + +address_directory: + debug_print = "T: address_directory for $local_part@$domain" + driver = appendfile + delivery_date_add + envelope_to_add + return_path_add + check_string = "" + escape_string = "" + maildir_format + +##################################################### +### end transport/35_exim4-config_address_directory +##################################################### +##################################################### +### retry/00_exim4-config_header +##################################################### + +###################################################################### +# RETRY CONFIGURATION # +###################################################################### + +begin retry + +##################################################### +### end retry/00_exim4-config_header +##################################################### +##################################################### +### retry/30_exim4-config +##################################################### + +### retry/30_exim4-config +################################# + +# This single retry rule applies to all domains and all errors. It specifies +# retries every 15 minutes for 2 hours, then increasing retry intervals, +# starting at 1 hour and increasing each time by a factor of 1.5, up to 16 +# hours, then retries every 6 hours until 4 days have passed since the first +# failed delivery. + +# Please note that these rules only limit the frequenzy of retries, the +# effective retry-time depends on the frequenzy of queue-running, too. +# See QUEUEINTERVAL in /etc/default/exim4. + +# Address or Domain Error Retries +# ----------------- ----- ------- + +* * F,2h,15m; G,16h,1h,1.5; F,4d,6h + +##################################################### +### end retry/30_exim4-config +##################################################### +##################################################### +### rewrite/00_exim4-config_header +##################################################### + +###################################################################### +# REWRITE CONFIGURATION # +###################################################################### + +begin rewrite + +##################################################### +### end rewrite/00_exim4-config_header +##################################################### +##################################################### +### rewrite/31_exim4-config_rewriting +##################################################### + +### rewrite/31_exim4-config_rewriting +################################# + +# This rewriting rule is particularily useful for dialup users who +# don't have their own domain, but could be useful for anyone. +# It looks up the real address of all local users in a file +.ifndef NO_EAA_REWRITE_REWRITE +*@+local_domains "${lookup{${local_part}}lsearch{/etc/email-addresses}\ + {$value}fail}" Ffrs +# identical rewriting rule for /etc/mailname +*@ETC_MAILNAME "${lookup{${local_part}}lsearch{/etc/email-addresses}\ + {$value}fail}" Ffrs +.endif + + +##################################################### +### end rewrite/31_exim4-config_rewriting +##################################################### +##################################################### +### auth/00_exim4-config_header +##################################################### + +###################################################################### +# AUTHENTICATION CONFIGURATION # +###################################################################### + +begin authenticators + + +##################################################### +### end auth/00_exim4-config_header +##################################################### +##################################################### +### auth/30_exim4-config_examples +##################################################### + +### auth/30_exim4-config_examples +################################# + +# The examples below are for server side authentication, when the +# local exim is SMTP server and clients authenticate to the local exim. + +# They allow two styles of plain-text authentication against an +# CONFDIR/passwd file whose syntax is described in exim4_passwd(5). + +# Hosts that are allowed to use AUTH are defined by the +# auth_advertise_hosts option in the main configuration. The default is +# "*", which allows authentication to all hosts over all kinds of +# connections if there is at least one authenticator defined here. +# Authenticators which rely on unencrypted clear text passwords don't +# advertise on unencrypted connections by default. Thus, it might be +# wise to set up TLS to allow encrypted connections. If TLS cannot be +# used for some reason, you can set AUTH_SERVER_ALLOW_NOTLS_PASSWORDS to +# advertise unencrypted clear text password based authenticators on all +# connections. As this is severely reducing security, using TLS is +# preferred over allowing clear text password based authenticators on +# unencrypted connections. + +# PLAIN authentication has no server prompts. The client sends its +# credentials in one lump, containing an authorization ID (which we do not +# use), an authentication ID, and a password. The latter two appear as +# $auth2 and $auth3 in the configuration and should be checked against a +# valid username and password. In a real configuration you would typically +# use $auth2 as a lookup key, and compare $auth3 against the result of the +# lookup, perhaps using the crypteq{}{} condition. + +# plain_server: +# driver = plaintext +# public_name = PLAIN +# server_condition = "${if crypteq{$auth3}{${extract{1}{:}{${lookup{$auth2}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}" +# server_set_id = $auth2 +# server_prompts = : +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif + +# LOGIN authentication has traditional prompts and responses. There is no +# authorization ID in this mechanism, so unlike PLAIN the username and +# password are $auth1 and $auth2. Apart from that you can use the same +# server_condition setting for both authenticators. + +# login_server: +# driver = plaintext +# public_name = LOGIN +# server_prompts = "Username:: : Password::" +# server_condition = "${if crypteq{$auth2}{${extract{1}{:}{${lookup{$auth1}lsearch{CONFDIR/passwd}{$value}{*:*}}}}}{1}{0}}" +# server_set_id = $auth1 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif +# +# cram_md5_server: +# driver = cram_md5 +# public_name = CRAM-MD5 +# server_secret = ${extract{2}{:}{${lookup{$auth1}lsearch{CONFDIR/passwd}{$value}fail}}} +# server_set_id = $auth1 + +# Here is an example of CRAM-MD5 authentication against PostgreSQL: +# +# psqldb_auth_server: +# driver = cram_md5 +# public_name = CRAM-MD5 +# server_secret = ${lookup pgsql{SELECT pw FROM users WHERE username = '${quote_pgsql:$auth1}'}{$value}fail} +# server_set_id = $auth1 + +# Authenticate against local passwords using sasl2-bin +# Requires exim_uid to be a member of sasl group, see README.Debian.gz +# plain_saslauthd_server: +# driver = plaintext +# public_name = PLAIN +# server_condition = ${if saslauthd{{$auth2}{$auth3}}{1}{0}} +# server_set_id = $auth2 +# server_prompts = : +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif +# +# login_saslauthd_server: +# driver = plaintext +# public_name = LOGIN +# server_prompts = "Username:: : Password::" +# # don't send system passwords over unencrypted connections +# server_condition = ${if saslauthd{{$auth1}{$auth2}}{1}{0}} +# server_set_id = $auth1 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif +# +# ntlm_sasl_server: +# driver = cyrus_sasl +# public_name = NTLM +# server_realm = +# server_set_id = $auth1 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif +# +# digest_md5_sasl_server: +# driver = cyrus_sasl +# public_name = DIGEST-MD5 +# server_realm = +# server_set_id = $auth1 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif + +# Authentcate against cyrus-sasl +# This is mainly untested, please report any problems to +# pkg-exim4-users@lists.alioth.debian.org. +# cram_md5_sasl_server: +# driver = cyrus_sasl +# public_name = CRAM-MD5 +# server_realm = +# server_set_id = $auth1 +# +# plain_sasl_server: +# driver = cyrus_sasl +# public_name = PLAIN +# server_realm = +# server_set_id = $auth1 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif +# +# login_sasl_server: +# driver = cyrus_sasl +# public_name = LOGIN +# server_realm = +# server_set_id = $auth1 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif + +# Authenticate against courier authdaemon + +# This is now the (working!) example from +# http://www.exim.org/eximwiki/FAQ/Policy_controls/Q0730 +# Possible pitfall: access rights on /var/run/courier/authdaemon/socket. +# plain_courier_authdaemon: +# driver = plaintext +# public_name = PLAIN +# server_condition = \ +# ${extract {ADDRESS} \ +# {${readsocket{/var/run/courier/authdaemon/socket} \ +# {AUTH ${strlen:exim\nlogin\n$auth2\n$auth3\n}\nexim\nlogin\n$auth2\n$auth3\n} }} \ +# {yes} \ +# fail} +# server_set_id = $auth2 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif + +# login_courier_authdaemon: +# driver = plaintext +# public_name = LOGIN +# server_prompts = Username:: : Password:: +# server_condition = \ +# ${extract {ADDRESS} \ +# {${readsocket{/var/run/courier/authdaemon/socket} \ +# {AUTH ${strlen:exim\nlogin\n$auth1\n$auth2\n}\nexim\nlogin\n$auth1\n$auth2\n} }} \ +# {yes} \ +# fail} +# server_set_id = $auth1 +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif + +# This one is a bad hack to support the broken version 4.xx of +# Microsoft Outlook Express which violates the RFCs by demanding +# "250-AUTH=" instead of "250-AUTH ". +# If your list of offered authenticators is other than PLAIN and LOGIN, +# you need to adapt the public_name line manually. +# It has to be the last authenticator to work and has not been tested +# well. Use at your own risk. +# See the thread entry point from +# http://www.exim.org/mail-archives/exim-users/Week-of-Mon-20050214/msg00213.html +# for the related discussion on the exim-users mailing list. +# Thanks to Fred Viles for this great work. + +# support_broken_outlook_express_4_server: +# driver = plaintext +# public_name = "\r\n250-AUTH=PLAIN LOGIN" +# server_prompts = User Name : Password +# server_condition = no +# .ifndef AUTH_SERVER_ALLOW_NOTLS_PASSWORDS +# server_advertise_condition = ${if eq{$tls_cipher}{}{}{*}} +# .endif + +############## +# See /usr/share/doc/exim4-base/README.Debian.gz +############## + +# These examples below are the equivalent for client side authentication. +# They get the passwords from CONFDIR/passwd.client, whose format is +# defined in exim4_passwd_client(5) + +# Because AUTH PLAIN and AUTH LOGIN send the password in clear, we +# only allow these mechanisms over encrypted connections by default. +# You can set AUTH_CLIENT_ALLOW_NOTLS_PASSWORDS to allow unencrypted +# clear text password authentication on all connections. + +cram_md5: + driver = cram_md5 + public_name = CRAM-MD5 + client_name = ${extract{1}{:}{${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$value}fail}}} + client_secret = ${extract{2}{:}{${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$value}fail}}} + +# this returns the matching line from passwd.client and doubles all ^ +PASSWDLINE=${sg{\ + ${lookup{$host}nwildlsearch{CONFDIR/passwd.client}{$value}fail}\ + }\ + {\\N[\\^]\\N}\ + {^^}\ + } + +plain: + driver = plaintext + public_name = PLAIN +.ifndef AUTH_CLIENT_ALLOW_NOTLS_PASSWORDS + client_send = "<; ${if !eq{$tls_cipher}{}\ + {^${extract{1}{:}{PASSWDLINE}}\ + ^${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}\ + }fail}" +.else + client_send = "<; ^${extract{1}{:}{PASSWDLINE}}\ + ^${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}" +.endif + +login: + driver = plaintext + public_name = LOGIN +.ifndef AUTH_CLIENT_ALLOW_NOTLS_PASSWORDS + # Return empty string if not non-TLS AND looking up $host in passwd-file + # yields a non-empty string; fail otherwise. + client_send = "<; ${if and{\ + {!eq{$tls_cipher}{}}\ + {!eq{PASSWDLINE}{}}\ + }\ + {}fail}\ + ; ${extract{1}{::}{PASSWDLINE}}\ + ; ${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}" +.else + # Return empty string if looking up $host in passwd-file yields a + # non-empty string; fail otherwise. + client_send = "<; ${if !eq{PASSWDLINE}{}\ + {}fail}\ + ; ${extract{1}{::}{PASSWDLINE}}\ + ; ${sg{PASSWDLINE}{\\N([^:]+:)(.*)\\N}{\\$2}}" +.endif +##################################################### +### end auth/30_exim4-config_examples +##################################################### diff --git a/etc/exim4/update-exim4.conf.conf b/etc/exim4/update-exim4.conf.conf new file mode 100644 index 0000000..a7a3bff --- /dev/null +++ b/etc/exim4/update-exim4.conf.conf @@ -0,0 +1,34 @@ +# /etc/exim4/update-exim4.conf.conf +# +# Edit this file and /etc/mailname by hand and execute update-exim4.conf +# yourself or use 'dpkg-reconfigure exim4-config' +# +# Please note that this is _not_ a dpkg-conffile and that automatic changes +# to this file might happen. The code handling this will honor your local +# changes, so this is usually fine, but will break local schemes that mess +# around with multiple versions of the file. +# +# update-exim4.conf uses this file to determine variable values to generate +# exim configuration macros for the configuration file. +# +# Most settings found in here do have corresponding questions in the +# Debconf configuration, but not all of them. +# +# This is a Debian specific file + +CFILEMODE='644' +dc_use_split_config='true' + +# THe options below are not used in this heaviliy customized configuration (but +# leaving them undefined causes update-exim4.conf to barf). +dc_eximconfig_configtype='' +dc_other_hostnames='' +dc_local_interfaces='' +dc_readhost='' +dc_relay_domains='' +dc_minimaldns='' +dc_relay_nets='' +dc_smarthost='' +dc_hide_mailname='' +dc_mailname_in_oh='' +dc_localdelivery='' diff --git a/etc/hostname b/etc/hostname new file mode 100644 index 0000000..3267914 --- /dev/null +++ b/etc/hostname @@ -0,0 +1 @@ +mail.drsnuggles.stderr.nl diff --git a/etc/mailname b/etc/mailname new file mode 100644 index 0000000..3267914 --- /dev/null +++ b/etc/mailname @@ -0,0 +1 @@ +mail.drsnuggles.stderr.nl diff --git a/etc/nullmailer/adminaddr b/etc/nullmailer/adminaddr deleted file mode 100644 index e69de29..0000000 diff --git a/etc/nullmailer/remotes b/etc/nullmailer/remotes deleted file mode 100644 index 3267914..0000000 --- a/etc/nullmailer/remotes +++ /dev/null @@ -1 +0,0 @@ -mail.drsnuggles.stderr.nl diff --git a/etc/pam.d/dovecot b/etc/pam.d/dovecot new file mode 100644 index 0000000..ddf9a02 --- /dev/null +++ b/etc/pam.d/dovecot @@ -0,0 +1,22 @@ +#%PAM-1.0 + +# We have a common auth and account section, since we don't need to check the +# "host" attribute, but the "mailHost" attribute. It would be sufficient to +# use a custom account section, but pam_ldap only loads its config once, so we +# can't use a different config for just the accoun section. + +# These are just taken from common-{auth,account}, but with the config= +# parameter added. +auth required pam_ldap.so config=/etc/pam_ldap_dovecot.conf + +# pam_unix does general checks based on NSS info, so it also works for ldap +# users. +account required pam_unix.so + +# pam_ldap does additional checks (in particular checking the host ldap +# attribute) but needs to be ignored when it does not know about a user. +# We point the module to an alternative configuration file. +account [success=ok new_authtok_reqd=ok ignore=ignore user_unknown=ignore default=bad] \ + pam_ldap.so config=/etc/pam_ldap_dovecot.conf + +@include common-session diff --git a/etc/pam_ldap_dovecot.conf b/etc/pam_ldap_dovecot.conf new file mode 100644 index 0000000..b5c31c8 --- /dev/null +++ b/etc/pam_ldap_dovecot.conf @@ -0,0 +1,21 @@ +# +# See /usr/share/libpam-ldap/ldap.conf for example configuration and more +# options. +# +# +# Dovecot-specific version of pam_ldap.conf that checks the mailHost attribute +# instead of the "host" attribute, so people without SSH access can still use +# IMAP, and only people whose mail is delivered on this host can use IMAP. + +# The distinguished name of the search base. +base dc=drsnuggles,dc=stderr,dc=nl + +# The LDAP server. ldaps:// is secure, ldapi:// is local socket +uri ldap://ldap.drsnuggles.stderr.nl + +# The LDAP version to use +ldap_version 3 + +# Only allow people to login to dovecot when their email is delivered here. +# Too bad this uses a hardcoded hostname, though... +pam_filter mailHost=mail.drsnuggles.stderr.nl diff --git a/etc/spamassassin/local.cf b/etc/spamassassin/local.cf new file mode 100644 index 0000000..0ac80b6 --- /dev/null +++ b/etc/spamassassin/local.cf @@ -0,0 +1,38 @@ +# This is the right place to customize your installation of SpamAssassin. +# +# See http://spamassassin.apache.org/full/3.2.x/doc/Mail_SpamAssassin_Conf.html +# for all configuration options. +# +########################################################################### + +# The SMTP of utwente are trusted and regarded as internal, so received header +# DNS checks with -lastexternal check the address before utwente instead of the +# utwente adresses. Also add kat to this list, since she fetches and resends +# mails. + +# Note that by not setting trusted_networks, all internal_networks are also +# trusted (which is what we want) + +# utwente MX +internal_networks 130.89.2.0/24 +# utwente mailboxes +internal_networks 130.89.5.0/24 +# SNT mailservers (at least 130.89.175.26 is one, that delivers for *.student.utwente.nl) +internal_networks 130.89.175.0/24 +# kat +internal_networks 130.89.168.160/32 + +# Mark any messages with score > 20 as spam, making exim reject them at the +# door. Any messages with lower spamscores should be filtered by users +# themselves. +required_score 20.0 + +# Report template. Should fit within 78 character (dots below). +# ........................................................................ +clear_report_template +report Spamchecked on "_HOSTNAME_" +report +report pts rule name description +report ---- ---------------------- ------------------------------------------- +report _SUMMARY_ +# ........................................................................