2 ### acl/40_exim4-config_check_data
3 #################################
5 # This ACL is used after the contents of a message have been received. This
6 # is the ACL in which you can test a message's headers or body, and in
7 # particular, this is where you can invoke external virus or spam scanners.
11 # Deny unless the address list headers are syntactically correct.
13 # This might reject legitimate mail...
15 message = Message headers fail syntax check
16 !verify = header_syntax
19 # require that there is a verifiable sender address in at least
20 # one of the "Sender:", "Reply-To:", or "From:" header lines.
22 message = No verifiable sender address in message headers
23 !verify = header_sender
25 # Mark messages with their spamscore and deny messages with a very high
28 message = Message was classified as spam
29 # Only scan messages that are small, since spam is hardly ever big (and
30 # scanning big messages costs lots of resources
31 condition = ${if <{$message_size}{80k}}
32 # Check using spamassasin, running as the "spamd" user.
33 # This condition will always succeed, since spam assassin is configured
34 # with a very low (even negative) threshold.
36 # Add spam headers (these will be added even when the next condition fails
37 # and the message is not denied).
38 add_header = X-Spam-Score: $spam_score ($spam_bar)
39 add_header = X-Spam-Report: $spam_report
40 # Reject any messages with a spam score of more than 20 ($spam_score_int is
41 # $spam_score * 10). This is fairly high, but we don't like really
43 condition = ${if >{$spam_score_int}{200}}
48 # vim: set sts=2 expandtab sw=2 ai: