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### 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 if the message contains an overlong line. Per the standards
# we should never receive one such via SMTP.
#
.ifndef IGNORE_SMTP_LINE_LENGTH_LIMIT
deny
condition = ${if > {$max_received_linelength}{998}}
message = maximum allowed line length is 998 octets, \
got $max_received_linelength
.endif
# Deny if the headers contain badly-formed addresses.
#
.ifndef NO_CHECK_DATA_VERIFY_HEADER_SYNTAX
deny
!acl = acl_local_deny_exceptions
!verify = header_syntax
message = header syntax
log_message = header syntax ($acl_verify_message)
.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
!acl = acl_local_deny_exceptions
!verify = header_sender
message = No verifiable sender address in message headers
.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 may 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. See
# /usr/share/doc/exim4-base/README.Debian.gz
#
# See the exim docs and the exim wiki for more suitable examples.
#
# # Remove internal headers
# warn
# remove_header = X-Spam_score: X-Spam_score_int : X-Spam_bar : \
# X-Spam_report
#
# warn
# condition = ${if <{$message_size}{120k}{1}{0}}
# # ":true" to add headers/acl variables even if not spam
# spam = nobody:true
# add_header = X-Spam_score: $spam_score
# add_header = X-Spam_bar: $spam_bar
# # Do not enable this unless you have shorted SpamAssassin's report
# #add_header = X-Spam_report: $spam_report
#
# Reject spam messages (score >15.0).
# This breaks mailing list and forward messages.
# deny
# condition = ${if <{$message_size}{120k}{1}{0}}
# condition = ${if >{$spam_score_int}{150}{true}{false}}
# message = Classified as spam (score $spam_score)
# 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
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