/etc/exim4/conf.d/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_whitelist_local_deny
!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_whitelist_local_deny
!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: $spam_report
# This hook allows you to hook in your own ACLs without having to
# modify this file. If you do it like we suggest, you'll end up with
# a small performance penalty since there is an additional file being
# accessed. This doesn't happen if you leave the macro unset.
.ifdef CHECK_DATA_LOCAL_ACL_FILE
.include CHECK_DATA_LOCAL_ACL_FILE
.endif
# accept otherwise
accept
/etc/exim4/local_acl_data
## Reject messages containing malware.
## Reject after DATA
##
#deny message = This message contains a virus ($malware_name) and has been rejected
#demime= *
#malware = *
#
#
#
deny message = This message contains an unwanted file extension ($found_extension)
demime = scr:vbs:bat:lnk:pif:bz2:exe:com
# Reject messages that have serious MIME errors.
# This calls the demime condition again, but it
# will return cached results.
deny message = Serious MIME defect detected ($demime_reason)
demime = *
condition = ${if >{$demime_errorlevel}{2}{1}{0}}
#
#
#
deny condition = ${if match{$header_subject:}{\NTestSubject\N} {yes}{no}}
log_message = Subject Test
message = Subject Test