From 04f256fab6e8e79a9cfa0f9ac0d9961855e4dc00 Mon Sep 17 00:00:00 2001 From: Matthijs Kooijman Date: Wed, 15 Apr 2009 19:41:49 +0200 Subject: [PATCH] dovecot: Customize the configuration. This enables dovecot for imaps and email delivery, using sieve for filtering, pam and nss for authnz and enabling virtual mailboxes. --- etc/dovecot/dovecot.conf | 1268 ++------------------------------------ 1 file changed, 58 insertions(+), 1210 deletions(-) diff --git a/etc/dovecot/dovecot.conf b/etc/dovecot/dovecot.conf index d9ce889..3feb70f 100644 --- a/etc/dovecot/dovecot.conf +++ b/etc/dovecot/dovecot.conf @@ -1,7 +1,5 @@ ## Dovecot configuration file -# If you're in a hurry, see http://wiki.dovecot.org/QuickConfiguration - # "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. @@ -9,1241 +7,91 @@ # and tabs are ignored. If you want to use either of these explicitly, put the # value inside quotes, eg.: key = "# char and trailing whitespace " -# Default values are shown for each setting, it's not required to uncomment -# any of the lines. Exception to this are paths, they're just examples with -# the real defaults being based on configure options. The paths listed here -# are for configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var -# --with-ssldir=/etc/ssl - -# Base directory where to store runtime data. -#base_dir = /var/run/dovecot/ - -# Protocols we want to be serving: imap imaps pop3 pop3s managesieve -# If you only want to use dovecot-auth, you can set this to "none". -#protocols = imap imaps - -# A space separated list of IP or host addresses where to listen in for -# connections. "*" listens in all IPv4 interfaces. "[::]" listens in all IPv6 -# interfaces. Use "*, [::]" for listening both IPv4 and IPv6. -# -# If you want to specify ports for each service, you will need to configure -# these settings inside the protocol imap/pop3/managesieve { ... } section, -# so you can specify different ports for IMAP/POP3/MANAGESIEVE. For example: -# protocol imap { -# listen = *:10143 -# ssl_listen = *:10943 -# .. -# } -# protocol pop3 { -# listen = *:10100 -# .. -# } -# protocol managesieve { -# listen = *:12000 -# .. -# } -#listen = * - -# Disable LOGIN command and all other plaintext authentications unless -# SSL/TLS is used (LOGINDISABLED capability). Note that if the remote IP -# matches the local IP (ie. you're connecting from the same computer), the -# connection is considered secure and plaintext authentication is allowed. -#disable_plaintext_auth = yes - -# Should all IMAP and POP3 processes be killed when Dovecot master process -# shuts down. Setting this to "no" means that Dovecot can be upgraded without -# forcing existing client connections to close (although that could also be -# a problem if the upgrade is eg. because of a security fix). This however -# means that after master process has died, the client processes can't write -# to log files anymore. -#shutdown_clients = yes - -## -## Logging -## - -# Log file to use for error messages, instead of sending them to syslog. -# /dev/stderr can be used to log into stderr. -#log_path = - -# Log file to use for informational and debug messages. -# Default is the same as log_path. -#info_log_path = - -# Prefix for each line written to log file. % codes are in strftime(3) -# format. -#log_timestamp = "%b %d %H:%M:%S " - -# Syslog facility to use if you're logging to syslog. Usually if you don't -# want to use "mail", you'll use local0..local7. Also other standard -# facilities are supported. -#syslog_facility = mail - -## -## SSL settings -## - -# IP or host address where to listen in for SSL connections. Remember to also -# add imaps and/or pop3s to protocols setting. Defaults to same as "listen" -# setting if not specified. -#ssl_listen = - -# SSL/TLS support: yes, no, required. -#ssl = yes - -# PEM encoded X.509 SSL/TLS certificate and private key. They're opened before -# dropping root privileges, so keep the key file unreadable by anyone but -# root. Included doc/mkcert.sh can be used to easily generate self-signed -# certificate, just make sure to update the domains in dovecot-openssl.cnf -#ssl_cert_file = /etc/ssl/certs/dovecot.pem -#ssl_key_file = /etc/ssl/private/dovecot.pem - -# If key file is password protected, give the password here. Alternatively -# give it when starting dovecot with -p parameter. Since this file is often -# world-readable, you may want to place this setting instead to a different -# root owned 0600 file by using !include_try . -#ssl_key_password = - -# File containing trusted SSL certificate authorities. Set this only if you -# intend to use ssl_verify_client_cert=yes. The CAfile should contain the -# CA-certificate(s) followed by the matching CRL(s). -#ssl_ca_file = - -# Request client to send a certificate. If you also want to require it, set -# ssl_require_client_cert=yes in auth section. -#ssl_verify_client_cert = no - -# Which field from certificate to use for username. commonName and -# x500UniqueIdentifier are the usual choices. You'll also need to set -# ssl_username_from_cert=yes. -#ssl_cert_username_field = commonName - -# How often to regenerate the SSL parameters file. Generation is quite CPU -# intensive operation. The value is in hours, 0 disables regeneration -# entirely. -#ssl_parameters_regenerate = 168 - -# SSL ciphers to use -#ssl_cipher_list = ALL:!LOW:!SSLv2 - -# Show protocol level SSL errors. -#verbose_ssl = no - -## -## Login processes -## - -# - -# Directory where authentication process places authentication UNIX sockets -# which login needs to be able to connect to. The sockets are created when -# running as root, so you don't have to worry about permissions. Note that -# everything in this directory is deleted when Dovecot is started. -#login_dir = /var/run/dovecot/login - -# chroot login process to the login_dir. Only reason not to do this is if you -# wish to run the whole Dovecot without roots. -#login_chroot = yes - -# User to use for the login process. Create a completely new user for this, -# and don't use it anywhere else. The user must also belong to a group where -# only it has access, it's used to control access for authentication process. -# Note that this user is NOT used to access mails. -#login_user = dovecot - -# Set max. process size in megabytes. If you don't use -# login_process_per_connection you might need to grow this. -#login_process_size = 64 - -# Should each login be processed in it's own process (yes), or should one -# login process be allowed to process multiple connections (no)? Yes is more -# secure, espcially with SSL/TLS enabled. No is faster since there's no need -# to create processes all the time. -#login_process_per_connection = yes - -# Number of login processes to keep for listening new connections. -#login_processes_count = 3 - -# Maximum number of login processes to create. The listening process count -# usually stays at login_processes_count, but when multiple users start logging -# in at the same time more extra processes are created. To prevent fork-bombing -# we check only once in a second if new processes should be created - if all -# of them are used at the time, we double their amount until the limit set by -# this setting is reached. -#login_max_processes_count = 128 - -# Maximum number of connections allowed per each login process. This setting -# is used only if login_process_per_connection=no. Once the limit is reached, -# the process notifies master so that it can create a new login process. -#login_max_connections = 256 - -# Greeting message for clients. -#login_greeting = Dovecot ready. - -# Space separated list of trusted network ranges. Connections from these -# IPs are allowed to override their IP addresses and ports (for logging and -# for authentication checks). disable_plaintext_auth is also ignored for -# these networks. Typically you'd specify your IMAP proxy servers here. -#login_trusted_networks = - -# Space-separated list of elements we want to log. The elements which have -# a non-empty variable value are joined together to form a comma-separated -# string. -#login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c - -# Login log format. %$ contains login_log_format_elements string, %s contains -# the data we want to log. -#login_log_format = %$: %s - -## -## Mailbox locations and namespaces -## - -# Location for users' mailboxes. This is the same as the old default_mail_env -# setting. The default is empty, which means that Dovecot tries to find the -# mailboxes automatically. This won't work if the user doesn't have any mail -# yet, so you should explicitly tell Dovecot the full location. -# -# If you're using mbox, giving a path to the INBOX file (eg. /var/mail/%u) -# isn't enough. You'll also need to tell Dovecot where the other mailboxes are -# kept. This is called the "root mail directory", and it must be the first -# path given in the mail_location setting. -# -# There are a few special variables you can use, eg.: -# -# %u - username -# %n - user part in user@domain, same as %u if there's no domain -# %d - domain part in user@domain, empty if there's no domain -# %h - home directory -# -# See doc/wiki/Variables.txt for full list. Some examples: -# -# mail_location = maildir:~/Maildir -# mail_location = mbox:~/mail:INBOX=/var/mail/%u -# mail_location = mbox:/var/mail/%d/%1n/%n:INDEX=/var/indexes/%d/%1n/%n -# -# -# -#mail_location = - -# If you need to set multiple mailbox locations or want to change default -# namespace settings, you can do it by defining namespace sections. -# -# You can have private, shared and public namespaces. Private namespaces -# are for user's personal mails. Shared namespaces are for accessing other -# users' mailboxes that have been shared. Public namespaces are for shared -# mailboxes that are managed by sysadmin. If you create any shared or public -# namespaces you'll typically want to enable ACL plugin also, otherwise all -# users can access all the shared mailboxes, assuming they have permissions -# on filesystem level to do so. -# -# REMEMBER: If you add any namespaces, the default namespace must be added -# explicitly, ie. mail_location does nothing unless you have a namespace -# without a location setting. Default namespace is simply done by having a -# namespace with empty prefix. -#namespace private { - # Hierarchy separator to use. You should use the same separator for all - # namespaces or some clients get confused. '/' is usually a good one. - # The default however depends on the underlying mail storage format. - #separator = - - # Prefix required to access this namespace. This needs to be different for - # all namespaces. For example "Public/". - #prefix = - - # Physical location of the mailbox. This is in same format as - # mail_location, which is also the default for it. - #location = - - # There can be only one INBOX, and this setting defines which namespace - # has it. - #inbox = no - - # If namespace is hidden, it's not advertised to clients via NAMESPACE - # extension. You'll most likely also want to set list=no. This is mostly - # useful when converting from another server with different namespaces which - # you want to deprecate but still keep working. For example you can create - # hidden namespaces with prefixes "~/mail/", "~%u/mail/" and "mail/". - #hidden = yes - - # Show the mailboxes under this namespace with LIST command. This makes the - # namespace visible for clients that don't support NAMESPACE extension. - # "children" value lists child mailboxes, but hides the namespace prefix. - #list = yes - - # Namespace handles its own subscriptions. If set to "no", the parent - # namespace handles them (empty prefix should always have this as "yes") - #subscriptions = yes -#} +# 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. -# Example shared namespace configuration -#namespace shared { - #separator = / - # Mailboxes are visible under "shared/user@domain/" - # %%n, %%d and %%u are expanded to the destination user. - #prefix = shared/%%u/ +# We server LDAP and use the deliver Local Delivery Agent +protocols = imaps lda - # Mail location for other users' mailboxes. Note that %variables and ~/ - # expands to the logged in user's data. %%n, %%d, %%u and %%h expand to the - # destination user's data. - #location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u - - # Use the default namespace for saving subscriptions. - #subscriptions = no - - # List the shared/ namespace only if there are visible shared mailboxes. - #list = children -#} - -# System user and group used to access mails. If you use multiple, userdb -# can override these by returning uid or gid fields. You can use either numbers -# or names. -#mail_uid = -#mail_gid = - -# Group to enable temporarily for privileged operations. Currently this is -# used only with INBOX when either its initial creation or dotlocking fails. -# Typically this is set to "mail" to give access to /var/mail. -#mail_privileged_group = - -# Grant access to these supplementary groups for mail processes. Typically -# these are used to set up access to shared mailboxes. Note that it may be -# dangerous to set these if users can create symlinks (e.g. if "mail" group is -# set here, ln -s /var/mail ~/mail/var could allow a user to delete others' -# mailboxes, or ln -s /secret/shared/box ~/mail/mybox would allow reading it). -#mail_access_groups = - -# Allow full filesystem access to clients. There's no access checks other than -# what the operating system does for the active UID/GID. It works with both -# maildir and mboxes, allowing you to prefix mailboxes names with eg. /path/ -# or ~user/. -#mail_full_filesystem_access = no - -## -## Mail processes -## - -# Enable mail process debugging. This can help you figure out why Dovecot -# isn't finding your mails. -#mail_debug = no - -# Log prefix for mail processes. See doc/wiki/Variables.txt for list of -# possible variables you can use. -#mail_log_prefix = "%Us(%u): " - -# Max. number of lines a mail process is allowed to log per second before it's -# throttled. 0 means unlimited. Typically there's no need to change this -# unless you're using mail_log plugin, which may log a lot. This setting is -# ignored while mail_debug=yes to avoid pointless throttling. -#mail_log_max_lines_per_sec = 10 - -# Don't use mmap() at all. This is required if you store indexes to shared -# filesystems (NFS or clustered filesystem). -#mmap_disable = no - -# Rely on O_EXCL to work when creating dotlock files. NFS supports O_EXCL -# since version 3, so this should be safe to use nowadays by default. -#dotlock_use_excl = yes - -# Don't use fsync() or fdatasync() calls. This makes the performance better -# at the cost of potential data loss if the server (or the file server) -# goes down. -#fsync_disable = no - -# Mail storage exists in NFS. Set this to yes to make Dovecot flush NFS caches -# whenever needed. If you're using only a single mail server this isn't needed. -#mail_nfs_storage = no -# Mail index files also exist in NFS. Setting this to yes requires -# mmap_disable=yes and fsync_disable=no. -#mail_nfs_index = no - -# Locking method for index files. Alternatives are fcntl, flock and dotlock. -# Dotlocking uses some tricks which may create more disk I/O than other locking -# methods. NFS users: flock doesn't work, remember to change mmap_disable. -#lock_method = fcntl - -# Drop all privileges before exec()ing the mail process. This is mostly -# meant for debugging, otherwise you don't get core dumps. It could be a small -# security risk if you use single UID for multiple users, as the users could -# ptrace() each others processes then. -#mail_drop_priv_before_exec = no - -# Show more verbose process titles (in ps). Currently shows user name and -# IP address. Useful for seeing who are actually using the IMAP processes -# (eg. shared mailboxes or if same uid is used for multiple accounts). -#verbose_proctitle = no - -# Valid UID range for users, defaults to 500 and above. This is mostly -# to make sure that users can't log in as daemons or other system users. -# Note that denying root logins is hardcoded to dovecot binary and can't -# be done even if first_valid_uid is set to 0. -#first_valid_uid = 500 -#last_valid_uid = 0 - -# Valid GID range for users, defaults to non-root/wheel. Users having -# non-valid GID as primary group ID aren't allowed to log in. If user -# belongs to supplementary groups with non-valid GIDs, those groups are -# not set. -#first_valid_gid = 1 -#last_valid_gid = 0 - -# Maximum number of running mail processes. When this limit is reached, -# new users aren't allowed to log in. -#max_mail_processes = 512 - -# Set max. process size in megabytes. Most of the memory goes to mmap()ing -# files, so it shouldn't harm much even if this limit is set pretty high. -#mail_process_size = 256 - -# Maximum allowed length for mail keyword name. It's only forced when trying -# to create new keywords. -#mail_max_keyword_length = 50 - -# ':' separated list of directories under which chrooting is allowed for mail -# processes (ie. /var/mail will allow chrooting to /var/mail/foo/bar too). -# This setting doesn't affect login_chroot, mail_chroot or auth chroot -# settings. If this setting is empty, "/./" in home dirs are ignored. -# WARNING: Never add directories here which local users can modify, that -# may lead to root exploit. Usually this should be done only if you don't -# allow shell access for users. -#valid_chroot_dirs = - -# Default chroot directory for mail processes. This can be overridden for -# specific users in user database by giving /./ in user's home directory -# (eg. /home/./user chroots into /home). Note that usually there is no real -# need to do chrooting, Dovecot doesn't allow users to access files outside -# their mail directory anyway. If your home directories are prefixed with -# the chroot directory, append "/." to mail_chroot. -#mail_chroot = - -## -## Mailbox handling optimizations -## - -# The minimum number of mails in a mailbox before updates are done to cache -# file. This allows optimizing Dovecot's behavior to do less disk writes at -# the cost of more disk reads. -#mail_cache_min_mail_count = 0 - -# When IDLE command is running, mailbox is checked once in a while to see if -# there are any new mails or other changes. This setting defines the minimum -# time in seconds to wait between those checks. Dovecot can also use dnotify, -# inotify and kqueue to find out immediately when changes occur. -#mailbox_idle_check_interval = 30 - -# Save mails with CR+LF instead of plain LF. This makes sending those mails -# take less CPU, especially with sendfile() syscall with Linux and FreeBSD. -# But it also creates a bit more disk I/O which may just make it slower. -# Also note that if other software reads the mboxes/maildirs, they may handle -# the extra CRs wrong and cause problems. -#mail_save_crlf = no - -## -## Maildir-specific settings -## - -# By default LIST command returns all entries in maildir beginning with a dot. -# Enabling this option makes Dovecot return only entries which are directories. -# This is done by stat()ing each entry, so it causes more disk I/O. -# (For systems setting struct dirent->d_type, this check is free and it's -# done always regardless of this setting) -#maildir_stat_dirs = no - -# When copying a message, do it with hard links whenever possible. This makes -# the performance much better, and it's unlikely to have any side effects. -#maildir_copy_with_hardlinks = yes - -# When copying a message, try to preserve the base filename. Only if the -# destination mailbox already contains the same name (ie. the mail is being -# copied there twice), a new name is given. The destination filename check is -# done only by looking at dovecot-uidlist file, so if something outside -# Dovecot does similar filename preserving copies, you may run into problems. -# NOTE: This setting requires maildir_copy_with_hardlinks = yes to work. -#maildir_copy_preserve_filename = no - -# Assume Dovecot is the only MUA accessing Maildir: Scan cur/ directory only -# when its mtime changes unexpectedly or when we can't find the mail otherwise. -#maildir_very_dirty_syncs = no - -## -## mbox-specific settings -## - -# Which locking methods to use for locking mbox. There are four available: -# dotlock: Create .lock file. This is the oldest and most NFS-safe -# solution. If you want to use /var/mail/ like directory, the users -# will need write access to that directory. -# dotlock_try: Same as dotlock, but if it fails because of permissions or -# because there isn't enough disk space, just skip it. -# fcntl : Use this if possible. Works with NFS too if lockd is used. -# flock : May not exist in all systems. Doesn't work with NFS. -# lockf : May not exist in all systems. Doesn't work with NFS. -# -# You can use multiple locking methods; if you do the order they're declared -# in is important to avoid deadlocks if other MTAs/MUAs are using multiple -# locking methods as well. Some operating systems don't allow using some of -# them simultaneously. -#mbox_read_locks = fcntl -#mbox_write_locks = dotlock fcntl - -# Maximum time in seconds to wait for lock (all of them) before aborting. -#mbox_lock_timeout = 300 - -# If dotlock exists but the mailbox isn't modified in any way, override the -# lock file after this many seconds. -#mbox_dotlock_change_timeout = 120 - -# When mbox changes unexpectedly we have to fully read it to find out what -# changed. If the mbox is large this can take a long time. Since the change -# is usually just a newly appended mail, it'd be faster to simply read the -# new mails. If this setting is enabled, Dovecot does this but still safely -# fallbacks to re-reading the whole mbox file whenever something in mbox isn't -# how it's expected to be. The only real downside to this setting is that if -# some other MUA changes message flags, Dovecot doesn't notice it immediately. -# Note that a full sync is done with SELECT, EXAMINE, EXPUNGE and CHECK -# commands. -#mbox_dirty_syncs = yes - -# Like mbox_dirty_syncs, but don't do full syncs even with SELECT, EXAMINE, -# EXPUNGE or CHECK commands. If this is set, mbox_dirty_syncs is ignored. -#mbox_very_dirty_syncs = no - -# Delay writing mbox headers until doing a full write sync (EXPUNGE and CHECK -# commands and when closing the mailbox). This is especially useful for POP3 -# where clients often delete all mails. The downside is that our changes -# aren't immediately visible to other MUAs. -#mbox_lazy_writes = yes - -# If mbox size is smaller than this (in kilobytes), don't write index files. -# If an index file already exists it's still read, just not updated. -#mbox_min_index_size = 0 - -## -## dbox-specific settings -## - -# Maximum dbox file size in kilobytes until it's rotated. -#dbox_rotate_size = 2048 - -# Minimum dbox file size in kilobytes before it's rotated -# (overrides dbox_rotate_days) -#dbox_rotate_min_size = 16 - -# Maximum dbox file age in days until it's rotated. Day always begins from -# midnight, so 1 = today, 2 = yesterday, etc. 0 = check disabled. -#dbox_rotate_days = 0 - -## -## IMAP specific settings -## protocol imap { - # Login executable location. - #login_executable = /usr/libexec/dovecot/imap-login - - # IMAP executable location. Changing this allows you to execute other - # binaries before the imap process is executed. - # - # This would write rawlogs into ~/dovecot.rawlog/ directory: - # mail_executable = /usr/libexec/dovecot/rawlog /usr/libexec/dovecot/imap - # - # This would attach gdb into the imap process and write backtraces into - # /tmp/gdbhelper.* files: - # mail_executable = /usr/libexec/dovecot/gdbhelper /usr/libexec/dovecot/imap - # - #mail_executable = /usr/libexec/dovecot/imap - - # Maximum IMAP command line length in bytes. Some clients generate very long - # command lines with huge mailboxes, so you may need to raise this if you get - # "Too long argument" or "IMAP command line too large" errors often. - #imap_max_line_length = 65536 - - # Maximum number of IMAP connections allowed for a user from each IP address. - # NOTE: The username is compared case-sensitively. - #mail_max_userip_connections = 10 - - # Support for dynamically loadable plugins. mail_plugins is a space separated - # list of plugins to load. - #mail_plugins = - #mail_plugin_dir = /usr/lib/dovecot/imap - - # IMAP logout format string: - # %i - total number of bytes read from client - # %o - total number of bytes sent to client - #imap_logout_format = bytes=%i/%o - - # Override the IMAP CAPABILITY response. - #imap_capability = - - # ID field names and values to send to clients. Using * as the value makes - # Dovecot use the default value. The following fields have default values - # currently: name, version, os, os-version, support-url, support-email. - #imap_id_send = - - # ID fields sent by client to log. * means everything. - #imap_id_log = - - # Workarounds for various client bugs: - # delay-newmail: - # Send EXISTS/RECENT new mail notifications only when replying to NOOP - # and CHECK commands. Some clients ignore them otherwise, for example OSX - # Mail (= 2.1.4) : %v.%u - # Dovecot v0.99.x : %v.%u - # tpop3d : %Mf - # - # Note that Outlook 2003 seems to have problems with %v.%u format which was - # Dovecot's default, so if you're building a new server it would be a good - # idea to change this. %08Xu%08Xv should be pretty fail-safe. - # - #pop3_uidl_format = %08Xu%08Xv - - # POP3 logout format string: - # %i - total number of bytes read from client - # %o - total number of bytes sent to client - # %t - number of TOP commands - # %p - number of bytes sent to client as a result of TOP command - # %r - number of RETR commands - # %b - number of bytes sent to client as a result of RETR command - # %d - number of deleted messages - # %m - number of messages (before deletion) - # %s - mailbox size in bytes (before deletion) - #pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s - - # Maximum number of POP3 connections allowed for a user from each IP address. - # NOTE: The username is compared case-sensitively. - #mail_max_userip_connections = 3 - - # Support for dynamically loadable plugins. mail_plugins is a space separated - # list of plugins to load. - #mail_plugins = - #mail_plugin_dir = /usr/lib/dovecot/pop3 - - # Workarounds for various client bugs: - # outlook-no-nuls: - # Outlook and Outlook Express hang if mails contain NUL characters. - # This setting replaces them with 0x80 character. - # oe-ns-eoh: - # Outlook Express and Netscape Mail breaks if end of headers-line is - # missing. This option simply sends it if it's missing. - # The list is space-separated. - #pop3_client_workarounds = -} - -## -## MANAGESIEVE specific settings -## - -protocol managesieve { - # Login executable location. - #login_executable = /usr/libexec/dovecot/managesieve-login - - # MANAGESIEVE executable location. See IMAP's mail_executable above for - # examples how this could be changed. - #mail_executable = /usr/libexec/dovecot/managesieve - - # Maximum MANAGESIEVE command line length in bytes. This setting is - # directly borrowed from IMAP. But, since long command lines are very - # unlikely with MANAGESIEVE, changing this will not be very useful. - #managesieve_max_line_length = 65536 - - # If, for some inobvious reason, the sieve_storage remains unset, the - # managesieve daemon uses the specification of the mail_location to find out - # where to store the sieve files (see explaination in README.managesieve). - # The example below, when uncommented, overrides any global mail_location - # specification and stores all the scripts in '~/mail/sieve' if sieve_storage - # is unset. However, you should always use the sieve_storage setting. - # mail_location = mbox:~/mail - - # To fool managesieve clients that are focused on timesieved you can - # specify the IMPLEMENTATION capability that the dovecot reports to clients - # (default: dovecot). - #managesieve_implementation_string = Cyrus timsieved v2.2.13 -} - -## -## LDA specific settings -## protocol lda { - # Address to use when sending rejection mails. - postmaster_address = postmaster@example.com - - # Hostname to use in various parts of sent mails, eg. in Message-Id. - # Default is the system's real hostname. - #hostname = - - # Support for dynamically loadable plugins. mail_plugins is a space separated - # list of plugins to load. - #mail_plugins = - #mail_plugin_dir = /usr/lib/dovecot/lda - - # If user is over quota, return with temporary failure instead of - # bouncing the mail. - #quota_full_tempfail = no - - # Format to use for logging mail deliveries. You can use variables: - # %$ - Delivery status message (e.g. "saved to INBOX") - # %m - Message-ID - # %s - Subject - # %f - From address - #deliver_log_format = msgid=%m: %$ - - # Binary to use for sending mails. - #sendmail_path = /usr/lib/sendmail - - # Subject: header to use for rejection mails. You can use the same variables - # as for rejection_reason below. - #rejection_subject = Rejected: %s - - # Human readable error message for rejection mails. You can use variables: - # %n = CRLF, %r = reason, %s = original subject, %t = recipient - #rejection_reason = Your message to <%t> was automatically rejected:%n%r - - # UNIX socket path to master authentication server to find users. - #auth_socket_path = /var/run/dovecot/auth-master + # 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 } -## -## Authentication processes -## - -# Executable location -#auth_executable = /usr/libexec/dovecot/dovecot-auth - -# Set max. process size in megabytes. -#auth_process_size = 256 - -# Authentication cache size in kilobytes. 0 means it's disabled. -# Note that bsdauth, PAM and vpopmail require cache_key to be set for caching -# to be used. -#auth_cache_size = 0 -# Time to live in seconds for cached data. After this many seconds the cached -# record is no longer used, *except* if the main database lookup returns -# internal failure. We also try to handle password changes automatically: If -# user's previous authentication was successful, but this one wasn't, the -# cache isn't used. For now this works only with plaintext authentication. -#auth_cache_ttl = 3600 -# TTL for negative hits (user not found). 0 disables caching them completely. -#auth_cache_negative_ttl = 3600 - -# Space separated list of realms for SASL authentication mechanisms that need -# them. You can leave it empty if you don't want to support multiple realms. -# Many clients simply use the first one listed here, so keep the default realm -# first. -#auth_realms = - -# Default realm/domain to use if none was specified. This is used for both -# SASL realms and appending @domain to username in plaintext logins. -#auth_default_realm = - -# List of allowed characters in username. If the user-given username contains -# a character not listed in here, the login automatically fails. This is just -# an extra check to make sure user can't exploit any potential quote escaping -# vulnerabilities with SQL/LDAP databases. If you want to allow all characters, -# set this value to empty. -#auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@ - -# Username character translations before it's looked up from databases. The -# value contains series of from -> to characters. For example "#@/@" means -# that '#' and '/' characters are translated to '@'. -#auth_username_translation = - -# Username formatting before it's looked up from databases. You can use -# the standard variables here, eg. %Lu would lowercase the username, %n would -# drop away the domain if it was given, or "%n-AT-%d" would change the '@' into -# "-AT-". This translation is done after auth_username_translation changes. -#auth_username_format = - -# If you want to allow master users to log in by specifying the master -# username within the normal username string (ie. not using SASL mechanism's -# support for it), you can specify the separator character here. The format -# is then . UW-IMAP uses "*" as the -# separator, so that could be a good choice. -#auth_master_user_separator = - -# Username to use for users logging in with ANONYMOUS SASL mechanism -#auth_anonymous_username = anonymous - -# More verbose logging. Useful for figuring out why authentication isn't -# working. -#auth_verbose = no - -# Even more verbose logging for debugging purposes. Shows for example SQL -# queries. -#auth_debug = no - -# In case of password mismatches, log the passwords and used scheme so the -# problem can be debugged. Enabling this also enables auth_debug. -#auth_debug_passwords = no - -# Maximum number of dovecot-auth worker processes. They're used to execute -# blocking passdb and userdb queries (eg. MySQL and PAM). They're -# automatically created and destroyed as needed. -#auth_worker_max_count = 30 - -# Host name to use in GSSAPI principal names. The default is to use the -# name returned by gethostname(). Use "$ALL" to allow all keytab entries. -#auth_gssapi_hostname = - -# Kerberos keytab to use for the GSSAPI mechanism. Will use the system -# default (usually /etc/krb5.keytab) if not specified. -#auth_krb5_keytab = - -# Do NTLM and GSS-SPNEGO authentication using Samba's winbind daemon and -# ntlm_auth helper. -#auth_use_winbind = no - -# Path for Samba's ntlm_auth helper binary. -#auth_winbind_helper_path = /usr/bin/ntlm_auth - -# Number of seconds to delay before replying to failed authentications. -#auth_failure_delay = 2 +# 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 { - # Space separated list of wanted authentication mechanisms: - # plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp skey - # gss-spnego - # NOTE: See also disable_plaintext_auth setting. + # 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 - # - # Password database is used to verify user's password (and nothing more). - # You can have multiple passdbs and userdbs. This is useful if you want to - # allow both system users (/etc/passwd) and virtual users to login without - # duplicating the system users into virtual database. - # - # - # - # By adding master=yes setting inside a passdb you make the passdb a list - # of "master users", who can log in as anyone else. Unless you're using PAM, - # you probably still want the destination user to be looked up from passdb - # that it really exists. This can be done by adding pass=yes setting to the - # master passdb. - - # Users can be temporarily disabled by adding a passdb with deny=yes. - # If the user is found from that database, authentication will fail. - # The deny passdb should always be specified before others, so it gets - # checked first. Here's an example: - - #passdb passwd-file { - # File contains a list of usernames, one per line - #args = /etc/dovecot.deny - #deny = yes - #} - - # PAM authentication. Preferred nowadays by most systems. - # Note that PAM can only be used to verify if user's password is correct, - # so it can't be used as userdb. If you don't want to use a separate user - # database (passwd usually), you can use static userdb. - # REMEMBER: You'll need /etc/pam.d/dovecot file created for PAM - # authentication to actually work. + # Use pam for authentication. The default options are fine. passdb pam { - # [session=yes] [setcred=yes] [failure_show_msg=yes] [max_requests=] - # [cache_key=] [] - # - # session=yes makes Dovecot open and immediately close PAM session. Some - # PAM plugins need this to work, such as pam_mkhomedir. - # - # setcred=yes makes Dovecot establish PAM credentials if some PAM plugins - # need that. They aren't ever deleted though, so this isn't enabled by - # default. - # - # max_requests specifies how many PAM lookups to do in one process before - # recreating the process. The default is 100, because many PAM plugins - # leak memory. - # - # cache_key can be used to enable authentication caching for PAM - # (auth_cache_size also needs to be set). It isn't enabled by default - # because PAM modules can do all kinds of checks besides checking password, - # such as checking IP address. Dovecot can't know about these checks - # without some help. cache_key is simply a list of variables (see - # doc/wiki/Variables.txt) which must match for the cached data to be used. - # Here are some examples: - # %u - Username must match. Probably sufficient for most uses. - # %u%r - Username and remote IP address must match. - # %u%s - Username and service (ie. IMAP, POP3) must match. - # - # The service name can contain variables, for example %Ls expands to - # pop3 or imap. - # - # Some examples: - # args = session=yes %Ls - # args = cache_key=%u dovecot - #args = dovecot + # Open a PAM session (to make pam_mkhomedir work, for example) + args = session=yes } - # System users (NSS, /etc/passwd, or similiar) - # In many systems nowadays this uses Name Service Switch, which is - # configured in /etc/nsswitch.conf. - #passdb passwd { - # [blocking=yes] - See userdb passwd for explanation - #args = - #} - - # Shadow passwords for system users (NSS, /etc/shadow or similiar). - # Deprecated by PAM nowadays. - # - #passdb shadow { - # [blocking=yes] - See userdb passwd for explanation - #args = - #} - - # PAM-like authentication for OpenBSD. - # - #passdb bsdauth { - # [cache_key=] - See cache_key in PAM for explanation. - #args = - #} - - # passwd-like file with specified location - # - #passdb passwd-file { - # [scheme=] [username_format=] - # - #args = - #} - - # checkpassword executable authentication - # NOTE: You will probably want to use "userdb prefetch" with this. - # - #passdb checkpassword { - # Path for checkpassword binary - #args = - #} - - # SQL database - #passdb sql { - # Path for SQL configuration file, see doc/dovecot-sql-example.conf - #args = - #} - - # LDAP database - #passdb ldap { - # Path for LDAP configuration file, see doc/dovecot-ldap-example.conf - #args = - #} - - # vpopmail authentication - #passdb vpopmail { - # [cache_key=] - See cache_key in PAM for explanation. - # [quota_template=