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Add option to block mail with zip files that contain supicious file e… #155

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Udera merged 1 commit into from
Jul 21, 2016
Merged

Add option to block mail with zip files that contain supicious file e… #155

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23 changes: 23 additions & 0 deletions docs/configure
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Original file line number Diff line number Diff line change
Expand Up @@ -157,6 +157,10 @@ acl_smtp_data = acl_check_content

acl_smtp_helo = acl_check_helo

# This ACL can be used to refuse certain file extension in ZIP files

#acl_smtp_mime = acl_check_mime

# This configuration variable defines the virus scanner that is used with
# the 'malware' ACL condition of the exiscan acl-patch. If you do not use
# virus scanning, leave it commented. Please read doc/exiscan-acl-readme.txt
Expand Down Expand Up @@ -389,6 +393,25 @@ acl_check_rcpt:

deny message = relay not permitted

# Check zip files for suspicious mail extensions
# http://www.gossamer-threads.com/lists/exim/users/98336#98336

#acl_check_mime:
#
# deny message = A .zip attachment contains a Windows-executable file - \
# blocked because we are afraid of new viruses \
# not recognized [yet] by antiviruses.
# condition = ${if match{$mime_filename}{\N(?i)\.zip$\N}}
# condition = ${if def:sender_host_address}
# !authenticated = *
# decode = default
# log_message = forbidden binary in attachment: filename=$mime_filename, \
# recipients=$recipients
# condition = ${if match{${run{/usr/bin/unzip -l \
# $mime_decoded_filename}}}\
# {\N(?i)\.(exe|com|ade|adep|adp|bas|bat|chm|cmd|cnf|com|cpl|crt|dll|hlp|hta|inf|ins|isp|js|jse|lnk|mad|maf|mag|mam|maq|mar|mas|matmav|maw|ocx|pcd|pif|reg|scf|scr|sct|vbe|vbs|wsc|wsf|wsh|url|xnk)\n\N}}
#
# accept

# This access control list is used for content scanning with the exiscan-acl
# patch. You must also uncomment the entry for acl_smtp_data (scroll up),
Expand Down