rules/20_ratware.cf - spamassassin - Git at Google

 # SpamAssassin rules file: known spam mailers
 #
 # Sometimes these leave 'sent by mailername' fingerprints in the
 # headers, which provide a nice way for us to catch them.
 #
 # Please don't modify this file as your changes will be overwritten with
 # the next update. Use @@LOCAL_RULES_DIR@@/local.cf instead.
 # See 'perldoc Mail::SpamAssassin::Conf' for details.
 #
 # <@LICENSE>
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.
 # The ASF licenses this file to you under the Apache License, Version 2.0
 # (the "License"); you may not use this file except in compliance with
 # the License.  You may obtain a copy of the License at:
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # </@LICENSE>
 #
 ###########################################################################

 header RATWARE_EGROUPS		X-Mailer =~ /eGroups Message Poster/
 describe RATWARE_EGROUPS	Bulk email fingerprint (eGroups) found

 # Note that the tests which look at the "ALL" pseudoheader are slower than
 # the specific header.
 # 100% overlap with X-Stormpost-To: header, but seems wise to leave it in
 header RATWARE_OE_MALFORMED	X-Mailer =~ /^Microsoft Outlook Express \d(?:\.\d+){3} \w+$/
 describe RATWARE_OE_MALFORMED	X-Mailer has malformed Outlook Express version
 header RATWARE_MOZ_MALFORMED	User-Agent =~ /Mozilla\/5\.0\d\d/
 describe RATWARE_MOZ_MALFORMED	Bulk email fingerprint (Mozilla malformed) found

 header RATWARE_MPOP_WEBMAIL	X-Mailer =~ /mPOP Web-Mail/i
 describe RATWARE_MPOP_WEBMAIL	Bulk email fingerprint (mPOP Web-Mail)

 ###########################################################################
 # Now, detect forgeries of real MUAs
 #
 # NOTE: these rules should specify version numbers!

 # first define situations where servers rewrite message id so we can't use message id to detect forgeries

 header __HOTMAIL_BAYDAV_MSGID		MESSAGEID =~ /^<[A-Z]{3}\d+-(?:DAV|SMTP)\d+[A-Z0-9]{25}\@phx\.gbl>$/m

 header __IPLANET_MESSAGING_SERVER Received =~ /iPlanet Messaging Server/

 header __LYRIS_EZLM_REMAILER  List-Unsubscribe =~ /<mailto:(?:leave-\S+|\S+-unsubscribe)\@\S+>$/

 header __SYMPATICO_MSGID		MESSAGEID =~ /^<BAYC\d+-PASMTP\d+[A-Z0-9]{25}\@CEZ\.ICE>$/m

 header __WACKY_SENDMAIL_VERSION Received =~ /\/CWT\/DCE\)/

 header __GROUPSIO_MSGID		MESSAGEID =~ /^<[[:xdigit:]]+\.[[:xdigit:]]+\@groups.io>$/m

 header __HAS_XORIGMSGID		X-Orig-Message-Id =~ /^<.+\@.+>$/m

 meta   __GROUPSIO_GATED		__GROUPSIO_MSGID && __HAS_XORIGMSGID

 #bz8202
 header	__MCRSFT_MSGID	MESSAGEID =~ /^<[[:alnum:]]{30,45}@[^>]*\.(outlook|exchangelabs).com>$/im

 meta	__UNUSABLE_MSGID (__MCRSFT_MSGID || __LYRIS_EZLM_REMAILER || __GATED_THROUGH_RCVD_REMOVER || __WACKY_SENDMAIL_VERSION || __IPLANET_MESSAGING_SERVER || __HOTMAIL_BAYDAV_MSGID || __SYMPATICO_MSGID && __GROUPSIO_GATED)

 ## now on to the forgery rules

 # AOL
 header __AOL_MUA		X-Mailer =~ /\bAOL\b/

 # Internet Mail Service
 header __IMS_MUA		X-Mailer =~ /Internet Mail Service/
 header __IMS_MSGID		MESSAGEID =~ /^<[A-F\d]{36,40}\@\S+>$/m
 meta FORGED_MUA_IMS		(__IMS_MUA && !__IMS_MSGID && !__UNUSABLE_MSGID)
 describe FORGED_MUA_IMS		Forged mail pretending to be from IMS

 # Message ID format introduced by Vista MAPI, maybe also Windows 2003 Server SP2
 header __VISTA_MSGID		MESSAGEID =~ /^<[A-F\d]{32}\@\S+>$/m

 # Outlook Express 4, 5, and 6
 header __OE_MUA			X-Mailer =~ /\bOutlook Express [456]\./
 header __OE_MSGID_1		MESSAGEID =~ /^<[A-Za-z0-9-]{7}[A-Za-z0-9]{20}\@hotmail\.com>$/m
 header __OE_MSGID_2		MESSAGEID =~ /^<(?:[0-9a-f]{8}|[0-9a-f]{12})\$[0-9a-f]{8}\$[0-9a-f]{8}\@\S+>$/m
 meta __FORGED_OE		(__OE_MUA && !__OE_MSGID_1 && !__OE_MSGID_2 && !__UNUSABLE_MSGID)

 # Outlook versions that usually use "dollar signs"
 header __OUTLOOK_DOLLARS_MUA	X-Mailer =~ /^Microsoft Outlook(?: 8| CWS, Build 9|, Build 10)\./
 header __OUTLOOK_DOLLARS_OTHER	MESSAGEID =~ /^<\!\~\!/m
 meta __FORGED_OUTLOOK_DOLLARS	(__OUTLOOK_DOLLARS_MUA && !__OE_MSGID_2 && !__OUTLOOK_DOLLARS_OTHER && !__VISTA_MSGID && !__IMS_MSGID && !__UNUSABLE_MSGID)
 # use new meta rules to implement FORGED_MUA_OUTLOOK rule from 2.60

 # bug 7567: obviously fake Outlook X-Mailer
 header __OUTLOOK_FAKE_MUA       X-Mailer =~ /^Outlook$/

 # bug 5496: avoid some FPs
 header __FMO_EXCL_O3416   X-Mailer =~ /^Microsoft Outlook, Build 10.0.3416$/
 header __FMO_EXCL_OE3790  X-Mailer =~ /^Microsoft Outlook Express 6.00.3790.3959$/
 # bug 5910: __VISTA_MSGID also now used by Outlook Express from XP SP3
 #
 meta FORGED_MUA_OUTLOOK         ((__FORGED_OE || __FORGED_OUTLOOK_DOLLARS || __OUTLOOK_FAKE_MUA) && !__FMO_EXCL_O3416 && !__FMO_EXCL_OE3790 && !__VISTA_MSGID)
 describe FORGED_MUA_OUTLOOK	Forged mail pretending to be from MS Outlook

 # Outlook IMO (Internet Mail Only)
 header __OIMO_MUA		X-Mailer =~ /Outlook IMO/
 header __OIMO_MSGID		MESSAGEID =~ /^<[A-P]{28}\.[-\w.]+\@\S+>$/m
 meta FORGED_MUA_OIMO		(__OIMO_MUA && !__OIMO_MSGID && !__OE_MSGID_2 && !__UNUSABLE_MSGID)
 describe FORGED_MUA_OIMO	Forged mail pretending to be from MS Outlook IMO

 # Not Ratware...

 header __HAS_X_LOOP		exists:X-Loop
 header __HAS_X_MAILING_LIST	exists:X-Mailing-List
 header __HAS_X_MAILMAN_VERSION	exists:X-Mailman-Version
 describe MAILING_LIST_MULTI	Multiple indicators imply a widely-seen list manager
 meta   MAILING_LIST_MULTI	__HAS_X_LOOP + __HAS_X_MAILING_LIST + __HAS_X_MAILMAN_VERSION + __HAS_X_BEEN_THERE +__DOS_HAS_LIST_UNSUB + __ML1 + __ML2 + __ML3 + __ML4 + __ML5 > 2
 tflags MAILING_LIST_MULTI	nice

 # QUALCOMM Eudora
 # Note: uses X_LOOP and X_MAILING_LIST as subrules
 # X-Mailer: QUALCOMM Windows Eudora Version 5.0   (and 5.1)
 # X-Mailer: QUALCOMM Windows Eudora Version 6.0.0.22
 # updated to fix bugs 2047, 2598, 2654
 # NOTE: this is the *only* spammish Eudora MUA pattern that wasn't
 # ignored using __OLD_EUDORA1 and __OLD_EUDORA2 under previous rules.
 # v7 can't be tested, as it sometimes doesn't generate MID
 header __EUDORA_MUA             X-Mailer =~ /^QUALCOMM Windows Eudora (?:Pro |Light )?Version [3456]\./
 header __EUDORA_MSGID		MESSAGEID =~ /^<(?:\d\d?\.){3,5}\d{14}\.[a-f0-9]{8}\@\S+(?:\sport\s\d+)?>$/m
 meta FORGED_MUA_EUDORA          __EUDORA_MUA && !( __EUDORA_MSGID || __UNUSABLE_MSGID || MAILING_LIST_MULTI || MSGID_FROM_MTA_HEADER )
 describe FORGED_MUA_EUDORA	Forged mail pretending to be from Eudora

 # From private mail with developers.  Some top tips here!
 header __THEBAT_MUA		X-Mailer =~ /^The Bat!/
 header __THEBAT_MUA_V1		X-Mailer =~ /^The Bat! \(v1\./
 #header __THEBAT_MUA_V2		X-Mailer =~ /^The Bat! \(v2\./
 #header __THEBAT_MUA_V3		X-Mailer =~ /^The Bat! \(v3\./
 header __CTYPE_CHARSET_QUOTED	Content-Type =~ /charset=\"/i
 header __CTYPE_HAS_BOUNDARY	Content-Type =~ /boundary/i
 header __BAT_BOUNDARY		Content-Type =~ /boundary=\"-{10}[A-F0-9]{4,}\"/
 header __MAILMAN_21             X-Mailman-Version =~ /\d/
 meta FORGED_MUA_THEBAT_CS	(__THEBAT_MUA && __CTYPE_CHARSET_QUOTED && !__MAILMAN_21)
 meta FORGED_MUA_THEBAT_BOUN     (__THEBAT_MUA && __CTYPE_HAS_BOUNDARY && !__BAT_BOUNDARY && !__MAILMAN_21)
 describe FORGED_MUA_THEBAT_CS	Mail pretending to be from The Bat! (charset)
 describe FORGED_MUA_THEBAT_BOUN Mail pretending to be from The Bat! (boundary)

 # bug 4649: bulk mail sent via Yahoo! often looks forged, even when it is not
 header __YAHOO_BULK		Received =~ /from \[\S+\] by \S+\.(?:groups|scd|dcn)\.yahoo\.com with NNFMP/

 meta FORGED_OUTLOOK_HTML	(!__YAHOO_BULK && __ANY_OUTLOOK_MUA && MIME_HTML_ONLY)
 describe FORGED_OUTLOOK_HTML	Outlook can't send HTML message only

 # bug 2525: FORGED_IMS_HTML fp'ing because new IMS *DOES* use text/html
 # ctype.  ARGH.  This was noted in build 5.5.2656.59, so permit builds
 # after that to get away with it.
 header __IMS_HTML_BUILDS	X-Mailer =~ /^Internet Mail Service .(?:[6789]\.|5\.[6789]|5\.5\.(?:[3456789]|2[789]|26[6789]|265[6789]))/
 header __IMS_HTML_RCVD		Received =~ /\bby \S+ with Internet Mail Service .(?:[6789]\.|5\.[6789]|5\.5\.(?:[3456789]|2[789]|26[6789]|265[6789]))/
 meta FORGED_IMS_HTML		(!__YAHOO_BULK && __IMS_MUA && MIME_HTML_ONLY && !(__IMS_HTML_BUILDS && __IMS_HTML_RCVD))
 describe FORGED_IMS_HTML	IMS can't send HTML message only

 meta FORGED_THEBAT_HTML		(__THEBAT_MUA_V1 && MIME_HTML_ONLY)
 describe FORGED_THEBAT_HTML	The Bat! can't send HTML message only

 # bug 2513
 header __REPTO_QUOTE		Reply-To =~ /".*"\s*\</
 meta REPTO_QUOTE_AOL		__REPTO_QUOTE && __AOL_MUA
 describe REPTO_QUOTE_AOL	AOL doesn't do quoting like this

 meta REPTO_QUOTE_IMS		__REPTO_QUOTE && __IMS_MUA
 describe REPTO_QUOTE_IMS	IMS doesn't do quoting like this

 meta REPTO_QUOTE_MSN		__REPTO_QUOTE && (__FROM_MSN_COM || __AT_MSN_MSGID)
 describe REPTO_QUOTE_MSN	MSN doesn't do quoting like this

 meta REPTO_QUOTE_QUALCOMM	__REPTO_QUOTE && __ANY_QUALCOMM_MUA
 describe REPTO_QUOTE_QUALCOMM	Qualcomm/Eudora doesn't do quoting like this

 meta REPTO_QUOTE_YAHOO		__REPTO_QUOTE && (__FROM_YAHOO_COM || __AT_YAHOO_MSGID)
 describe REPTO_QUOTE_YAHOO	Yahoo! doesn't do quoting like this

 # bug 1561
 # stronger version of USER_AGENT_APPLEMAIL
 # Apple Mail doesn't send text/html at all (unless it's an attachment)
 # It'll send text/plain, or multipart/alternative with text/plain and
 # text/enriched parts (boundary of "Apple-Mail-\d--\d+").  It can, however,
 # send a multipart/mixed with a single text/html attachment, so don't use
 # MIME_HTML_ONLY.
 # perhaps limit CTYPE to "text/plain", "multipart/alternative" with
 # "text/plain" and "text/enhanced", or "multipart/mixed"?
 # bug 4223: expand for new Apple Mail version format
 header __X_MAILER_APPLEMAIL	X-Mailer =~ /^Apple Mail \(\d\.\d+(?:\.\d+)?\)$/
 header __MSGID_APPLEMAIL        Message-Id =~ /^<[0-9A-F]{8}-(?:[0-9A-F]{4}-){3}[0-9A-F]{12}\@\S+>$/
 header __MIME_VERSION_APPLEMAIL	Mime-Version =~ /^1\.0 \(Apple Message framework v\d+(?:\.\d+)?\)$/
 meta __USER_AGENT_APPLEMAIL	!__CTYPE_HTML && __X_MAILER_APPLEMAIL && (__MSGID_APPLEMAIL || __MIME_VERSION_APPLEMAIL)

 # 2003-02-23: quinlan
 # some useful meta rule sub-elements
 header __CTYPE_HTML		Content-Type =~ /text\/html/i
 header __ANY_IMS_MUA		X-Mailer =~ /^Internet Mail Service\b/
 header __ANY_OUTLOOK_MUA	X-Mailer =~ /^Microsoft (?:Office )?Outlook\b/

 header __ANY_QUALCOMM_MUA       X-Mailer =~ /\bQUALCOMM\b/
 meta FORGED_QUALCOMM_TAGS	(__ANY_QUALCOMM_MUA && __MIME_HTML && !__TAG_EXISTS_HTML)
 describe FORGED_QUALCOMM_TAGS	QUALCOMM mailers can't send HTML in this format

 meta FORGED_IMS_TAGS		(!__YAHOO_BULK && __ANY_IMS_MUA && __MIME_HTML && !(__TAG_EXISTS_HTML && __TAG_EXISTS_HEAD && __TAG_EXISTS_META && __TAG_EXISTS_BODY))
 describe FORGED_IMS_TAGS	IMS mailers can't send HTML in this format

 meta FORGED_OUTLOOK_TAGS	(!__YAHOO_BULK && __ANY_OUTLOOK_MUA && __MIME_HTML && !(__TAG_EXISTS_HTML && __TAG_EXISTS_HEAD && __TAG_EXISTS_META && __TAG_EXISTS_BODY))
 describe FORGED_OUTLOOK_TAGS	Outlook can't send HTML in this format

 # Send-Safe ratware (idea from Alan Curry)
 # random alphanumerics, separated into groups of 16 by dashes (the first
 # and last group may be shorter), with a lowercase "l" and a number
 # appended. The final number is the length of the whole string not
 # including the dashes or the "l<number>".  Why? I have no idea.  It's
 # not a tracking code - the spamware does not save it locally.
 #
 # jm: it's specifically to throw off MIME base64 encoding, to evade AOL's
 # filters.
 #
 # http://groups.google.com/groups?selm=atp1ip0n22%40enews3.newsguy.com
 rawbody RATWARE_HASH_DASH	/[a-z\d]-[a-z\d]{16}-[a-z\d]{1,16}(?-i:l)\d/i
 describe RATWARE_HASH_DASH	Contains a hashbuster in Send-Safe format

 ########################################################################
 # Most ratware uses message templates I would guess.
 # Here's two popular ones...

 ########################################################################
 # This ratware always uses a +0000 TZ in the Date header, and has a multiplicity
 # of From: header formats. ("From" header samples from Steven Champeon
 # <schampeo.hesketh.com> via the spamtools.lists.abuse.net and SPAM-L lists).
 #
 # "First Last" <firstlast_[a-z][a-z]@somedomain>        1
 # "First Last" <firstlast[a-z][a-z]@somedomain>         1
 # "First Last" <first.last[a-z][a-z]@somedomain>        1
 # "First Last" <first_last[a-z][a-z]@somedomain>        1
 # "First Last" <first_last_[a-z][a-z]@somedomain>       1
 # "First Last" <flast_[a-z][a-z]@somedomain>            2
 # "First Last" <flast[a-z][a-z]@somedomain>             2
 # "First Last" <f.last_[a-z][a-z]@somedomain>           2
 # "First Last" <f.last[a-z][a-z]@somedomain>            2
 # "First Last" <f_last[a-z][a-z]@somedomain>            2
 # "First Last" <last[a-z][a-z]@somedomain>              3
 # "First M. Last" <firstlast_[a-z][a-z]@somedomain>     4
 # "First M. Last" <firstlast[a-z][a-z]@somedomain>      4
 # "First M. Last" <first.m.last[a-z][a-z]@somedomain>   5
 # "First M. Last" <firstmlast[a-z][a-z]@somedomain>     5
 # "First M. Last" <firstmlast_[a-z][a-z]@somedomain>    5
 # "First M. Last" <fmlast_[a-z][a-z]@somedomain>        6
 # "First M. Last" <mlast[a-z][a-z]@somedomain>          7
 # "First M. Last" <m.last[a-z][a-z]@somedomain>         7
 header __0_TZ_1      From =~ /^\"(\w)(\w+) (\w+)\" <\1\2[\._]?\3_?[a-z][a-z]\@/i
 header __0_TZ_2      From =~ /^\"(\w)(\w+) (\w+)\" <\1[\._]?\3_?[a-z][a-z]\@/i
 header __0_TZ_3      From =~ /^\"(\w)(\w+) (\w+)\" <\3_?[a-z][a-z]\@/i
 header __0_TZ_4      From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\1\2[\._]?\4_?[a-z][a-z]\@/i
 header __0_TZ_5      From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\1\2[\._]?\3[\._]?\4_?[a-z][a-z]\@/i
 header __0_TZ_6      From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\1\3\4_?[a-z][a-z]\@/i
 header __0_TZ_7      From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\3[\._]?\4_?[a-z][a-z]\@/i

 header __RATWARE_0_TZ_DATE	Date =~ / \+0000$/

 meta RATWARE_ZERO_TZ   		(__RATWARE_0_TZ_DATE && __CTYPE_HTML && (__0_TZ_1 || __0_TZ_2 || __0_TZ_3 || __0_TZ_4 || __0_TZ_5 || __0_TZ_6 || __0_TZ_7))
 describe RATWARE_ZERO_TZ	Bulk email fingerprint (+0000) found


 header X_MESSAGE_INFO		exists:X-Message-Info
 describe X_MESSAGE_INFO		Bulk email fingerprint (X-Message-Info) found

 # case-sensitive rule
 # only significant rules with no FPs, hit recently, on 2+ corpuses
 header HEADER_SPAM		ALL =~ /^(?:Alternate-Recipient|Antivirus|Approved|Delivery-Notification|Disclose-Recipients|Error-path|Language|Location|Mime-Subversion|Newsletter-ID|PID|Rot|UID|X-BounceTrace|X-CS-IP|X-Company-Address|X-Company-City|X-Company-Country|X-Company-State|X-Company-Zip|X-E(?:[Mm]ail)?|X-Encoding|X-Originating-Company|X-RMD-Text|X-SG4|X-SP-Track-ID|X-Webmail-Time|X-bounce-to):/m
 describe HEADER_SPAM		Bulk email fingerprint (header-based) found

 header RATWARE_RCVD_PF		Received =~ / \(Postfix\) with ESMTP id [^;]+\; \S+ \d+ \S+ \d+ \d+:\d+:\d+ \S+$/s
 describe RATWARE_RCVD_PF	Bulk email fingerprint (Received PF) found

 header RATWARE_RCVD_AT		Received =~ / by \S+\@\S+ with Microsoft SMTPSVC/
 describe RATWARE_RCVD_AT	Bulk email fingerprint (Received @) found

 header __RCVD_WITH_EXCHANGE	Received =~ /with Microsoft Exchange Server/

 meta RATWARE_OUTLOOK_NONAME	__MSGID_DOLLARS_OK && !__HAS_X_MAILER && !__RCVD_WITH_EXCHANGE
 describe RATWARE_OUTLOOK_NONAME	Bulk email fingerprint (Outlook no name) found


 header __MIMEOLE_MS		X-MIMEOLE =~ /^Produced By Microsoft MimeOLE/
 meta RATWARE_MS_HASH 		__MSGID_DOLLARS_OK && !__MIMEOLE_MS && !__RCVD_WITH_EXCHANGE
 describe RATWARE_MS_HASH	Bulk email fingerprint (msgid ms hash) found

 ###########################################################################

 ifplugin Mail::SpamAssassin::Plugin::HeaderEval

 header __GATED_THROUGH_RCVD_REMOVER  eval:gated_through_received_hdr_remover()

 header __RATWARE_NAME_ID	eval:check_ratware_name_id()
 meta RATWARE_NAME_ID		__RATWARE_0_TZ_DATE && __RATWARE_NAME_ID
 describe RATWARE_NAME_ID	Bulk email fingerprint (msgid from) found

 header RATWARE_EFROM		eval:check_ratware_envelope_from()
 describe RATWARE_EFROM		Bulk email fingerprint (envfrom) found

 endif

 ###########################################################################

 ifplugin Mail::SpamAssassin::Plugin::MIMEEval

 body __MIME_HTML		eval:check_for_mime_html()

 endif

 ###########################################################################

 ifplugin Mail::SpamAssassin::Plugin::HTMLEval

 body __TAG_EXISTS_BODY		eval:html_tag_exists('body')
 body __TAG_EXISTS_HEAD		eval:html_tag_exists('head')
 body __TAG_EXISTS_HTML		eval:html_tag_exists('html')
 body __TAG_EXISTS_META		eval:html_tag_exists('meta')
 body __TAG_EXISTS_STYLE		eval:html_tag_exists('style')
 body __TAG_EXISTS_SCRIPT	eval:html_tag_exists('script')

 endif
	# SpamAssassin rules file: known spam mailers
	#
	# Sometimes these leave 'sent by mailername' fingerprints in the
	# headers, which provide a nice way for us to catch them.
	#
	# Please don't modify this file as your changes will be overwritten with
	# the next update. Use @@LOCAL_RULES_DIR@@/local.cf instead.
	# See 'perldoc Mail::SpamAssassin::Conf' for details.
	#
	# <@LICENSE>
	# Licensed to the Apache Software Foundation (ASF) under one or more
	# contributor license agreements. See the NOTICE file distributed with
	# this work for additional information regarding copyright ownership.
	# The ASF licenses this file to you under the Apache License, Version 2.0
	# (the "License"); you may not use this file except in compliance with
	# the License. You may obtain a copy of the License at:
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	# </@LICENSE>
	#
	###########################################################################

	header RATWARE_EGROUPS X-Mailer =~ /eGroups Message Poster/
	describe RATWARE_EGROUPS Bulk email fingerprint (eGroups) found

	# Note that the tests which look at the "ALL" pseudoheader are slower than
	# the specific header.
	# 100% overlap with X-Stormpost-To: header, but seems wise to leave it in
	header RATWARE_OE_MALFORMED X-Mailer =~ /^Microsoft Outlook Express \d(?:\.\d+){3} \w+$/
	describe RATWARE_OE_MALFORMED X-Mailer has malformed Outlook Express version
	header RATWARE_MOZ_MALFORMED User-Agent =~ /Mozilla\/5\.0\d\d/
	describe RATWARE_MOZ_MALFORMED Bulk email fingerprint (Mozilla malformed) found

	header RATWARE_MPOP_WEBMAIL X-Mailer =~ /mPOP Web-Mail/i
	describe RATWARE_MPOP_WEBMAIL Bulk email fingerprint (mPOP Web-Mail)

	###########################################################################
	# Now, detect forgeries of real MUAs
	#
	# NOTE: these rules should specify version numbers!

	# first define situations where servers rewrite message id so we can't use message id to detect forgeries

	header __HOTMAIL_BAYDAV_MSGID MESSAGEID =~ /^<[A-Z]{3}\d+-(?:DAV\|SMTP)\d+[A-Z0-9]{25}\@phx\.gbl>$/m

	header __IPLANET_MESSAGING_SERVER Received =~ /iPlanet Messaging Server/

	header __LYRIS_EZLM_REMAILER List-Unsubscribe =~ /<mailto:(?:leave-\S+\|\S+-unsubscribe)\@\S+>$/

	header __SYMPATICO_MSGID MESSAGEID =~ /^<BAYC\d+-PASMTP\d+[A-Z0-9]{25}\@CEZ\.ICE>$/m

	header __WACKY_SENDMAIL_VERSION Received =~ /\/CWT\/DCE\)/

	header __GROUPSIO_MSGID MESSAGEID =~ /^<[[:xdigit:]]+\.[[:xdigit:]]+\@groups.io>$/m

	header __HAS_XORIGMSGID X-Orig-Message-Id =~ /^<.+\@.+>$/m

	meta __GROUPSIO_GATED __GROUPSIO_MSGID && __HAS_XORIGMSGID

	#bz8202
	header __MCRSFT_MSGID MESSAGEID =~ /^<[[:alnum:]]{30,45}@[^>]*\.(outlook\|exchangelabs).com>$/im

	meta __UNUSABLE_MSGID (__MCRSFT_MSGID \|\| __LYRIS_EZLM_REMAILER \|\| __GATED_THROUGH_RCVD_REMOVER \|\| __WACKY_SENDMAIL_VERSION \|\| __IPLANET_MESSAGING_SERVER \|\| __HOTMAIL_BAYDAV_MSGID \|\| __SYMPATICO_MSGID && __GROUPSIO_GATED)

	## now on to the forgery rules

	# AOL
	header __AOL_MUA X-Mailer =~ /\bAOL\b/

	# Internet Mail Service
	header __IMS_MUA X-Mailer =~ /Internet Mail Service/
	header __IMS_MSGID MESSAGEID =~ /^<[A-F\d]{36,40}\@\S+>$/m
	meta FORGED_MUA_IMS (__IMS_MUA && !__IMS_MSGID && !__UNUSABLE_MSGID)
	describe FORGED_MUA_IMS Forged mail pretending to be from IMS

	# Message ID format introduced by Vista MAPI, maybe also Windows 2003 Server SP2
	header __VISTA_MSGID MESSAGEID =~ /^<[A-F\d]{32}\@\S+>$/m

	# Outlook Express 4, 5, and 6
	header __OE_MUA X-Mailer =~ /\bOutlook Express [456]\./
	header __OE_MSGID_1 MESSAGEID =~ /^<[A-Za-z0-9-]{7}[A-Za-z0-9]{20}\@hotmail\.com>$/m
	header __OE_MSGID_2 MESSAGEID =~ /^<(?:[0-9a-f]{8}\|[0-9a-f]{12})\$[0-9a-f]{8}\$[0-9a-f]{8}\@\S+>$/m
	meta __FORGED_OE (__OE_MUA && !__OE_MSGID_1 && !__OE_MSGID_2 && !__UNUSABLE_MSGID)

	# Outlook versions that usually use "dollar signs"
	header __OUTLOOK_DOLLARS_MUA X-Mailer =~ /^Microsoft Outlook(?: 8\| CWS, Build 9\|, Build 10)\./
	header __OUTLOOK_DOLLARS_OTHER MESSAGEID =~ /^<\!\~\!/m
	meta __FORGED_OUTLOOK_DOLLARS (__OUTLOOK_DOLLARS_MUA && !__OE_MSGID_2 && !__OUTLOOK_DOLLARS_OTHER && !__VISTA_MSGID && !__IMS_MSGID && !__UNUSABLE_MSGID)
	# use new meta rules to implement FORGED_MUA_OUTLOOK rule from 2.60

	# bug 7567: obviously fake Outlook X-Mailer
	header __OUTLOOK_FAKE_MUA X-Mailer =~ /^Outlook$/

	# bug 5496: avoid some FPs
	header __FMO_EXCL_O3416 X-Mailer =~ /^Microsoft Outlook, Build 10.0.3416$/
	header __FMO_EXCL_OE3790 X-Mailer =~ /^Microsoft Outlook Express 6.00.3790.3959$/
	# bug 5910: __VISTA_MSGID also now used by Outlook Express from XP SP3
	#
	meta FORGED_MUA_OUTLOOK ((__FORGED_OE \|\| __FORGED_OUTLOOK_DOLLARS \|\| __OUTLOOK_FAKE_MUA) && !__FMO_EXCL_O3416 && !__FMO_EXCL_OE3790 && !__VISTA_MSGID)
	describe FORGED_MUA_OUTLOOK Forged mail pretending to be from MS Outlook

	# Outlook IMO (Internet Mail Only)
	header __OIMO_MUA X-Mailer =~ /Outlook IMO/
	header __OIMO_MSGID MESSAGEID =~ /^<[A-P]{28}\.[-\w.]+\@\S+>$/m
	meta FORGED_MUA_OIMO (__OIMO_MUA && !__OIMO_MSGID && !__OE_MSGID_2 && !__UNUSABLE_MSGID)
	describe FORGED_MUA_OIMO Forged mail pretending to be from MS Outlook IMO

	# Not Ratware...

	header __HAS_X_LOOP exists:X-Loop
	header __HAS_X_MAILING_LIST exists:X-Mailing-List
	header __HAS_X_MAILMAN_VERSION exists:X-Mailman-Version
	describe MAILING_LIST_MULTI Multiple indicators imply a widely-seen list manager
	meta MAILING_LIST_MULTI __HAS_X_LOOP + __HAS_X_MAILING_LIST + __HAS_X_MAILMAN_VERSION + __HAS_X_BEEN_THERE +__DOS_HAS_LIST_UNSUB + __ML1 + __ML2 + __ML3 + __ML4 + __ML5 > 2
	tflags MAILING_LIST_MULTI nice

	# QUALCOMM Eudora
	# Note: uses X_LOOP and X_MAILING_LIST as subrules
	# X-Mailer: QUALCOMM Windows Eudora Version 5.0 (and 5.1)
	# X-Mailer: QUALCOMM Windows Eudora Version 6.0.0.22
	# updated to fix bugs 2047, 2598, 2654
	# NOTE: this is the only spammish Eudora MUA pattern that wasn't
	# ignored using __OLD_EUDORA1 and __OLD_EUDORA2 under previous rules.
	# v7 can't be tested, as it sometimes doesn't generate MID
	header __EUDORA_MUA X-Mailer =~ /^QUALCOMM Windows Eudora (?:Pro \|Light )?Version [3456]\./
	header __EUDORA_MSGID MESSAGEID =~ /^<(?:\d\d?\.){3,5}\d{14}\.[a-f0-9]{8}\@\S+(?:\sport\s\d+)?>$/m
	meta FORGED_MUA_EUDORA __EUDORA_MUA && !( __EUDORA_MSGID \|\| __UNUSABLE_MSGID \|\| MAILING_LIST_MULTI \|\| MSGID_FROM_MTA_HEADER )
	describe FORGED_MUA_EUDORA Forged mail pretending to be from Eudora

	# From private mail with developers. Some top tips here!
	header __THEBAT_MUA X-Mailer =~ /^The Bat!/
	header __THEBAT_MUA_V1 X-Mailer =~ /^The Bat! \(v1\./
	#header __THEBAT_MUA_V2 X-Mailer =~ /^The Bat! \(v2\./
	#header __THEBAT_MUA_V3 X-Mailer =~ /^The Bat! \(v3\./
	header __CTYPE_CHARSET_QUOTED Content-Type =~ /charset=\"/i
	header __CTYPE_HAS_BOUNDARY Content-Type =~ /boundary/i
	header __BAT_BOUNDARY Content-Type =~ /boundary=\"-{10}[A-F0-9]{4,}\"/
	header __MAILMAN_21 X-Mailman-Version =~ /\d/
	meta FORGED_MUA_THEBAT_CS (__THEBAT_MUA && __CTYPE_CHARSET_QUOTED && !__MAILMAN_21)
	meta FORGED_MUA_THEBAT_BOUN (__THEBAT_MUA && __CTYPE_HAS_BOUNDARY && !__BAT_BOUNDARY && !__MAILMAN_21)
	describe FORGED_MUA_THEBAT_CS Mail pretending to be from The Bat! (charset)
	describe FORGED_MUA_THEBAT_BOUN Mail pretending to be from The Bat! (boundary)

	# bug 4649: bulk mail sent via Yahoo! often looks forged, even when it is not
	header __YAHOO_BULK Received =~ /from \[\S+\] by \S+\.(?:groups\|scd\|dcn)\.yahoo\.com with NNFMP/

	meta FORGED_OUTLOOK_HTML (!__YAHOO_BULK && __ANY_OUTLOOK_MUA && MIME_HTML_ONLY)
	describe FORGED_OUTLOOK_HTML Outlook can't send HTML message only

	# bug 2525: FORGED_IMS_HTML fp'ing because new IMS DOES use text/html
	# ctype. ARGH. This was noted in build 5.5.2656.59, so permit builds
	# after that to get away with it.
	header __IMS_HTML_BUILDS X-Mailer =~ /^Internet Mail Service .(?:[6789]\.\|5\.[6789]\|5\.5\.(?:[3456789]\|2[789]\|26[6789]\|265[6789]))/
	header __IMS_HTML_RCVD Received =~ /\bby \S+ with Internet Mail Service .(?:[6789]\.\|5\.[6789]\|5\.5\.(?:[3456789]\|2[789]\|26[6789]\|265[6789]))/
	meta FORGED_IMS_HTML (!__YAHOO_BULK && __IMS_MUA && MIME_HTML_ONLY && !(__IMS_HTML_BUILDS && __IMS_HTML_RCVD))
	describe FORGED_IMS_HTML IMS can't send HTML message only

	meta FORGED_THEBAT_HTML (__THEBAT_MUA_V1 && MIME_HTML_ONLY)
	describe FORGED_THEBAT_HTML The Bat! can't send HTML message only

	# bug 2513
	header __REPTO_QUOTE Reply-To =~ /"."\s\</
	meta REPTO_QUOTE_AOL __REPTO_QUOTE && __AOL_MUA
	describe REPTO_QUOTE_AOL AOL doesn't do quoting like this

	meta REPTO_QUOTE_IMS __REPTO_QUOTE && __IMS_MUA
	describe REPTO_QUOTE_IMS IMS doesn't do quoting like this

	meta REPTO_QUOTE_MSN __REPTO_QUOTE && (__FROM_MSN_COM \|\| __AT_MSN_MSGID)
	describe REPTO_QUOTE_MSN MSN doesn't do quoting like this

	meta REPTO_QUOTE_QUALCOMM __REPTO_QUOTE && __ANY_QUALCOMM_MUA
	describe REPTO_QUOTE_QUALCOMM Qualcomm/Eudora doesn't do quoting like this

	meta REPTO_QUOTE_YAHOO __REPTO_QUOTE && (__FROM_YAHOO_COM \|\| __AT_YAHOO_MSGID)
	describe REPTO_QUOTE_YAHOO Yahoo! doesn't do quoting like this

	# bug 1561
	# stronger version of USER_AGENT_APPLEMAIL
	# Apple Mail doesn't send text/html at all (unless it's an attachment)
	# It'll send text/plain, or multipart/alternative with text/plain and
	# text/enriched parts (boundary of "Apple-Mail-\d--\d+"). It can, however,
	# send a multipart/mixed with a single text/html attachment, so don't use
	# MIME_HTML_ONLY.
	# perhaps limit CTYPE to "text/plain", "multipart/alternative" with
	# "text/plain" and "text/enhanced", or "multipart/mixed"?
	# bug 4223: expand for new Apple Mail version format
	header __X_MAILER_APPLEMAIL X-Mailer =~ /^Apple Mail \(\d\.\d+(?:\.\d+)?\)$/
	header __MSGID_APPLEMAIL Message-Id =~ /^<[0-9A-F]{8}-(?:[0-9A-F]{4}-){3}[0-9A-F]{12}\@\S+>$/
	header __MIME_VERSION_APPLEMAIL Mime-Version =~ /^1\.0 \(Apple Message framework v\d+(?:\.\d+)?\)$/
	meta __USER_AGENT_APPLEMAIL !__CTYPE_HTML && __X_MAILER_APPLEMAIL && (__MSGID_APPLEMAIL \|\| __MIME_VERSION_APPLEMAIL)

	# 2003-02-23: quinlan
	# some useful meta rule sub-elements
	header __CTYPE_HTML Content-Type =~ /text\/html/i
	header __ANY_IMS_MUA X-Mailer =~ /^Internet Mail Service\b/
	header __ANY_OUTLOOK_MUA X-Mailer =~ /^Microsoft (?:Office )?Outlook\b/

	header __ANY_QUALCOMM_MUA X-Mailer =~ /\bQUALCOMM\b/
	meta FORGED_QUALCOMM_TAGS (__ANY_QUALCOMM_MUA && __MIME_HTML && !__TAG_EXISTS_HTML)
	describe FORGED_QUALCOMM_TAGS QUALCOMM mailers can't send HTML in this format

	meta FORGED_IMS_TAGS (!__YAHOO_BULK && __ANY_IMS_MUA && __MIME_HTML && !(__TAG_EXISTS_HTML && __TAG_EXISTS_HEAD && __TAG_EXISTS_META && __TAG_EXISTS_BODY))
	describe FORGED_IMS_TAGS IMS mailers can't send HTML in this format

	meta FORGED_OUTLOOK_TAGS (!__YAHOO_BULK && __ANY_OUTLOOK_MUA && __MIME_HTML && !(__TAG_EXISTS_HTML && __TAG_EXISTS_HEAD && __TAG_EXISTS_META && __TAG_EXISTS_BODY))
	describe FORGED_OUTLOOK_TAGS Outlook can't send HTML in this format

	# Send-Safe ratware (idea from Alan Curry)
	# random alphanumerics, separated into groups of 16 by dashes (the first
	# and last group may be shorter), with a lowercase "l" and a number
	# appended. The final number is the length of the whole string not
	# including the dashes or the "l<number>". Why? I have no idea. It's
	# not a tracking code - the spamware does not save it locally.
	#
	# jm: it's specifically to throw off MIME base64 encoding, to evade AOL's
	# filters.
	#
	# http://groups.google.com/groups?selm=atp1ip0n22%40enews3.newsguy.com
	rawbody RATWARE_HASH_DASH /[a-z\d]-[a-z\d]{16}-[a-z\d]{1,16}(?-i:l)\d/i
	describe RATWARE_HASH_DASH Contains a hashbuster in Send-Safe format

	########################################################################
	# Most ratware uses message templates I would guess.
	# Here's two popular ones...

	########################################################################
	# This ratware always uses a +0000 TZ in the Date header, and has a multiplicity
	# of From: header formats. ("From" header samples from Steven Champeon
	# <schampeo.hesketh.com> via the spamtools.lists.abuse.net and SPAM-L lists).
	#
	# "First Last" <firstlast_[a-z][a-z]@somedomain> 1
	# "First Last" <firstlast[a-z][a-z]@somedomain> 1
	# "First Last" <first.last[a-z][a-z]@somedomain> 1
	# "First Last" <first_last[a-z][a-z]@somedomain> 1
	# "First Last" <first_last_[a-z][a-z]@somedomain> 1
	# "First Last" <flast_[a-z][a-z]@somedomain> 2
	# "First Last" <flast[a-z][a-z]@somedomain> 2
	# "First Last" <f.last_[a-z][a-z]@somedomain> 2
	# "First Last" <f.last[a-z][a-z]@somedomain> 2
	# "First Last" <f_last[a-z][a-z]@somedomain> 2
	# "First Last" <last[a-z][a-z]@somedomain> 3
	# "First M. Last" <firstlast_[a-z][a-z]@somedomain> 4
	# "First M. Last" <firstlast[a-z][a-z]@somedomain> 4
	# "First M. Last" <first.m.last[a-z][a-z]@somedomain> 5
	# "First M. Last" <firstmlast[a-z][a-z]@somedomain> 5
	# "First M. Last" <firstmlast_[a-z][a-z]@somedomain> 5
	# "First M. Last" <fmlast_[a-z][a-z]@somedomain> 6
	# "First M. Last" <mlast[a-z][a-z]@somedomain> 7
	# "First M. Last" <m.last[a-z][a-z]@somedomain> 7
	header __0_TZ_1 From =~ /^\"(\w)(\w+) (\w+)\" <\1\2[\._]?\3_?[a-z][a-z]\@/i
	header __0_TZ_2 From =~ /^\"(\w)(\w+) (\w+)\" <\1[\._]?\3_?[a-z][a-z]\@/i
	header __0_TZ_3 From =~ /^\"(\w)(\w+) (\w+)\" <\3_?[a-z][a-z]\@/i
	header __0_TZ_4 From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\1\2[\._]?\4_?[a-z][a-z]\@/i
	header __0_TZ_5 From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\1\2[\._]?\3[\._]?\4_?[a-z][a-z]\@/i
	header __0_TZ_6 From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\1\3\4_?[a-z][a-z]\@/i
	header __0_TZ_7 From =~ /^\"(\w)(\w+) (\w)\. (\w+)\" <\3[\._]?\4_?[a-z][a-z]\@/i

	header __RATWARE_0_TZ_DATE Date =~ / \+0000$/

	meta RATWARE_ZERO_TZ (__RATWARE_0_TZ_DATE && __CTYPE_HTML && (__0_TZ_1 \|\| __0_TZ_2 \|\| __0_TZ_3 \|\| __0_TZ_4 \|\| __0_TZ_5 \|\| __0_TZ_6 \|\| __0_TZ_7))
	describe RATWARE_ZERO_TZ Bulk email fingerprint (+0000) found


	header X_MESSAGE_INFO exists:X-Message-Info
	describe X_MESSAGE_INFO Bulk email fingerprint (X-Message-Info) found

	# case-sensitive rule
	# only significant rules with no FPs, hit recently, on 2+ corpuses
	header HEADER_SPAM ALL =~ /^(?:Alternate-Recipient\|Antivirus\|Approved\|Delivery-Notification\|Disclose-Recipients\|Error-path\|Language\|Location\|Mime-Subversion\|Newsletter-ID\|PID\|Rot\|UID\|X-BounceTrace\|X-CS-IP\|X-Company-Address\|X-Company-City\|X-Company-Country\|X-Company-State\|X-Company-Zip\|X-E(?:[Mm]ail)?\|X-Encoding\|X-Originating-Company\|X-RMD-Text\|X-SG4\|X-SP-Track-ID\|X-Webmail-Time\|X-bounce-to):/m
	describe HEADER_SPAM Bulk email fingerprint (header-based) found

	header RATWARE_RCVD_PF Received =~ / \(Postfix\) with ESMTP id [^;]+\; \S+ \d+ \S+ \d+ \d+:\d+:\d+ \S+$/s
	describe RATWARE_RCVD_PF Bulk email fingerprint (Received PF) found

	header RATWARE_RCVD_AT Received =~ / by \S+\@\S+ with Microsoft SMTPSVC/
	describe RATWARE_RCVD_AT Bulk email fingerprint (Received @) found

	header __RCVD_WITH_EXCHANGE Received =~ /with Microsoft Exchange Server/

	meta RATWARE_OUTLOOK_NONAME __MSGID_DOLLARS_OK && !__HAS_X_MAILER && !__RCVD_WITH_EXCHANGE
	describe RATWARE_OUTLOOK_NONAME Bulk email fingerprint (Outlook no name) found



	header __MIMEOLE_MS X-MIMEOLE =~ /^Produced By Microsoft MimeOLE/
	meta RATWARE_MS_HASH __MSGID_DOLLARS_OK && !__MIMEOLE_MS && !__RCVD_WITH_EXCHANGE
	describe RATWARE_MS_HASH Bulk email fingerprint (msgid ms hash) found

	###########################################################################

	ifplugin Mail::SpamAssassin::Plugin::HeaderEval

	header __GATED_THROUGH_RCVD_REMOVER eval:gated_through_received_hdr_remover()

	header __RATWARE_NAME_ID eval:check_ratware_name_id()
	meta RATWARE_NAME_ID __RATWARE_0_TZ_DATE && __RATWARE_NAME_ID
	describe RATWARE_NAME_ID Bulk email fingerprint (msgid from) found

	header RATWARE_EFROM eval:check_ratware_envelope_from()
	describe RATWARE_EFROM Bulk email fingerprint (envfrom) found

	endif

	###########################################################################

	ifplugin Mail::SpamAssassin::Plugin::MIMEEval

	body __MIME_HTML eval:check_for_mime_html()

	endif

	###########################################################################

	ifplugin Mail::SpamAssassin::Plugin::HTMLEval

	body __TAG_EXISTS_BODY eval:html_tag_exists('body')
	body __TAG_EXISTS_HEAD eval:html_tag_exists('head')
	body __TAG_EXISTS_HTML eval:html_tag_exists('html')
	body __TAG_EXISTS_META eval:html_tag_exists('meta')
	body __TAG_EXISTS_STYLE eval:html_tag_exists('style')
	body __TAG_EXISTS_SCRIPT eval:html_tag_exists('script')

	endif