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Filename : cpanel_exim_system_filter.local
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# Managed by Salt

# Exim filter
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#  cPanel System Filter for EXIM                                                                                #
#  VERSION = 2.0                                                                                                #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!DO NOT MODIFY THIS FILE DIRECTLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!      #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#   Direct modifications to the /etc/cpanel_exim_system_filter file will be lost when the configuration is      #
#   next rebuilt. To have modifications retained, please use one of the following options:                      #
#                                                                                                               #
#    1)                                                                                                         #
#      * Place each sysfilter block you wish to include in a unique file at:                                    #
#            /usr/local/cpanel/etc/exim/sysfilter/options/                                                      #
#      * Enable or disable the custom block in WHM using:                                                       #
#          Service Configuration => Exim Configuration Manager => Filters => Custom Filter: [your unique file]  #
#                                                                                                               #
#    2)                                                                                                         #
#      * Create a custom sysfilter file in /etc/                                                                #
#      * Change the location of the sysfilter file in WHM using:                                                #
#          Service Configuration => Exim Configuration Manager => Filters => System Filter File                 #
#                                                                                                               #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!DO NOT MODIFY THIS FILE DIRECTLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!      #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#                                                                                                               #
#  Only process once                                                                                            #
#                                                                                                               #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
if not first_delivery
then
  finish
endif
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#                                                                                                               #
#  Ignore "real" errors                                                                                         #
#                                                                                                               #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
if error_message and $header_from: contains "Mailer-Daemon@"
then
  finish
endif
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

# BEGIN - Included from /usr/local/cpanel/etc/exim/sysfilter/options/attachments
# (Use the Basic Editor in the Exim Configuration Manager in WHM to change)
# or manually edit /etc/exim.conf.localopts and run /scripts/buildeximconf
## -----------------------------------------------------------------------
# Look for single part MIME messages with suspicious name extensions
# Check Content-Type header using quoted filename [content_type_quoted_fn_match]
if $header_content-type: matches "(?:file)?name=(\"[^\"]+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc])\")"
then
  fail text "This message has been rejected because it has\n\
         potentially executable content $1\n\
         This form of attachment has been used by\n\
             recent viruses or other malware.\n\
         If you meant to send this file then please\n\
         package it up as a zip file and resend it."
  seen finish
endif
# same again using unquoted filename [content_type_unquoted_fn_match]
if $header_content-type: matches "(?:file)?name=(\\\\S+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc]))"
then
  fail text "This message has been rejected because it has\n\
         potentially executable content $1\n\
         This form of attachment has been used by\n\
             recent viruses or other malware.\n\
         If you meant to send this file then please\n\
         package it up as a zip file and resend it."
  seen finish
endif


## -----------------------------------------------------------------------
# Attempt to catch embedded VBS attachments
# in emails.   These were used as the basis for 
# the ILOVEYOU virus and its variants - many many varients
# Quoted filename - [body_quoted_fn_match]
if $message_body matches "(?:Content-(?:Type:(?>\\\\s*)[\\\\w-]+/[\\\\w-]+|Disposition:(?>\\\\s*)attachment);(?>\\\\s*)(?:file)?name=|begin(?>\\\\s+)[0-7]{3,4}(?>\\\\s+))(\"[^\"]+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc])\")[\\\\s;]"
then
  fail text "This message has been rejected because it has\n\
         a potentially executable attachment $1\n\
         This form of attachment has been used by\n\
             recent viruses or other malware.\n\
         If you meant to send this file then please\n\
         package it up as a zip file and resend it."
  seen finish
endif
# same again using unquoted filename [body_unquoted_fn_match]
if $message_body matches "(?:Content-(?:Type:(?>\\\\s*)[\\\\w-]+/[\\\\w-]+|Disposition:(?>\\\\s*)attachment);(?>\\\\s*)(?:file)?name=|begin(?>\\\\s+)[0-7]{3,4}(?>\\\\s+))(\\\\S+\\\\.(?:ad[ep]|ba[st]|chm|cmd|com|cpl|crt|eml|exe|hlp|hta|in[fs]|isp|jse?|lnk|md[be]|ms[cipt]|pcd|pif|reg|scr|sct|shs|url|vb[se]|ws[fhc]))[\\\\s;]"
then
  fail text "This message has been rejected because it has\n\
         a potentially executable attachment $1\n\
         This form of attachment has been used by\n\
             recent viruses or other malware.\n\
         If you meant to send this file then please\n\
         package it up as a zip file and resend it."
  seen finish
endif
## -----------------------------------------------------------------------



#### Version history
#
# 0.01 5 May 2000
#   Initial release
# 0.02 8 May 2000
#   Widened list of content-types accepted, added WSF extension
# 0.03 8 May 2000
#   Embedded the install notes in for those that don't do manuals
# 0.04 9 May 2000
#   Check global content-type header.  Efficiency mods to REs
# 0.05 9 May 2000
#   More minor efficiency mods, doc changes
# 0.06 20 June 2000
#   Added extension handling - thx to Douglas Gray Stephens & Jeff Carnahan
# 0.07 19 July 2000
#   Latest MS Outhouse bug catching
# 0.08 19 July 2000
#   Changed trigger length to 80 chars, fixed some spelling
# 0.09 29 September 2000
#   More extensions... its getting so we should just allow 2 or 3 through
# 0.10 18 January 2001
#   Removed exclusion for error messages - this is a little nasty
#   since it has other side effects, hence we do still exclude
#   on unix like error messages
# 0.11 20 March, 2001
#   Added CMD extension, tidied docs slightly, added RCS tag
#   ** Missed changing version number at top of file :-(
# 0.12 10 May, 2001
#   Added HTA extension
# 0.13 22 May, 2001
#   Reformatted regexps and code to build them so that they are
#   shorter than the limits on pre exim 3.20 filters.  This will
#   make them significantly less efficient, but I am getting so
#   many queries about this that requiring 3.2x appears unsupportable.
# 0.14 15 August,2001
#   Added .lnk extension - most requested item :-)
#   Reformatted everything so its now built from a set of short
#   library files, cutting down on manual duplication.
#   Changed \w in filename detection to . - dodges locale problems
#   Explicit application of GPL after queries on license status
# 0.15 17 August, 2001
#   Changed the . in filename detect to \S (stops it going mad)
# 0.16 19 September, 2001
#   Pile of new extensions including the eml in current use
# 0.17 19 September, 2001
#   Syntax fix
#
#### Install Notes
#
# Exim filters run the exim filter language - a very primitive
# scripting language - in place of a user .forward file, or on
# a per system basis (on all messages passing through).
# The filtering capability is documented in the main set of manuals
# a copy of which can be found on the exim web site
#   http://www.exim.org/
#
# To install, copy the filter file (with appropriate permissions)
# to /etc/exim/system_filter.exim and add to your exim config file
# [location is installation depedant - typicaly /etc/exim/config ]
# in the first section the line:-
#   message_filter = /etc/exim/system_filter.exim
#   message_body_visible = 5000
#
# You may also want to set the message_filter_user & message_filter_group
# options, but they default to the standard exim user and so can
# be left untouched.  The other message_filter_* options are only
# needed if you modify this to do other functions such as deliveries.
# The main exim documentation is quite thorough and so I see no need
# to expand it here...
#
# Any message that matches the filter will then be bounced.
# If you wish you can change the error message by editing it
# in the section above - however be careful you don't break it.
#
# After install exim should be restarted - a kill -HUP to the
# daemon will do this.
#
#### LIMITATIONS
#
# This filter tries to parse MIME with a regexp... that doesn't
# work too well.  It will also only see the amount of the body
# specified in message_body_visible
#
#### BASIS
#
# The regexp that is used to pickup MIME/uuencoded body parts with
# quoted filenames is replicated below (in perl format).  
# You need to remember that exim converts newlines to spaces in
# the message_body variable.
#
#     (?:Content-                   # start of content header
#     (?:Type: (?>\s*)              # rest of c/t header
#       [\w-]+/[\w-]+               # content-type (any)
#       |Disposition: (?>\s*)           # content-disposition hdr
#       attachment)                 # content-disposition
#     ;(?>\s*)                  # ; space or newline
#     (?:file)?name=                # filename=/name= 
#     |begin (?>\s+) [0-7]{3,4} (?>\s+))        # begin octal-mode
#     (\"[^\"]+\.                   # quoted filename.
#       (?:ad[ep]               # list of extns
#       |ba[st]
#       |chm
#       |cmd
#       |com
#       |cpl
#       |crt
#       |eml
#       |exe
#       |hlp
#       |hta
#       |in[fs]
#       |isp
#       |jse?
#       |lnk
#       |md[be]
#       |ms[cipt]
#       |pcd
#       |pif
#       |reg
#       |scr
#       |sct
#       |shs
#       |url
#       |vb[se]
#       |ws[fhc])
#     \"                        # end quote
#     )                     # end of filename capture
#     [\s;]                     # trailing ;/space/newline

#
#
### [End]
# END - Included from /usr/local/cpanel/etc/exim/sysfilter/options/attachments

# BEGIN - Included from /usr/local/cpanel/etc/exim/sysfilter/options/spam_rewrite
# (Use the Basic Editor in the Exim Configuration Manager in WHM to change)
# or manually edit /etc/exim.conf.localopts and run /scripts/buildeximconf
if "${if def:header_X-Spam-Subject: {there}}" is there
then
    headers remove Subject
    headers add "Subject: $h_X-Spam-Subject:"
    headers remove X-Spam-Subject
endif

if $header_subject: contains "I RECORDED YOU" then
   seen finish
endif

if $header_subject: contains "CANADLAN Pharmacy" then
   seen finish
endif

# END - Included from /usr/local/cpanel/etc/exim/sysfilter/options/spam_rewrite