# 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>
# Copyright 2004 Apache Software Foundation
#
# Licensed 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
header RATWARE_HASH_2 X-Mailer =~ /^[A-Za-z0-9\._]{16,}$/
describe RATWARE_HASH_2 Bulk email fingerprint (hash 2) found
header RATWARE_HASH_2_V2 X-Mailer =~ /^[A-Za-z0-9\._]{14,}$/
describe RATWARE_HASH_2_V2 Bulk email fingerprint (hash 2 v2) found
header RATWARE_JPFREE X-Mailer =~ /jpfree Group Mail Express/
describe RATWARE_JPFREE Bulk email fingerprint (jpfree) 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
uri RATWARE_STORM_URI m{http://\S+/sp/t\.pl\?id=\d+:\d+}i
describe RATWARE_STORM_URI Bulk email fingerprint (StormPost) found
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_RCVD_LC_ESMTP Received =~ /^from (?:(?:unknown|\d+\.\d+\.\d+\.\d+) \(\S+\)|\[\d+\.\d+\.\d+\.\d+\]) by \S+ with (?:esmtp|local|smtp); /m
describe RATWARE_RCVD_LC_ESMTP Bulk email fingerprint ('esmtp' Received) found
header RATWARE_MOZ_MALFORMED User-Agent =~ /Mozilla\/5\.0\d\d/
describe RATWARE_MOZ_MALFORMED Bulk email fingerprint (Mozilla malformed) found
###########################################################################
# Now, detect forgeries of real MUAs
#
# NOTE: these rules should specify version numbers!
# Dec 17 2002 jm: this means "message ID is either too old or has been
# rewritten by a gateway". Made into an eval test since meta tests cannot
# (yet) chain from other meta tests.
header __UNUSABLE_MSGID eval:check_messageid_not_usable()
# 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+>$/m
meta FORGED_MUA_IMS (__IMS_MUA && !__IMS_MSGID && !__UNUSABLE_MSGID)
describe FORGED_MUA_IMS Forged mail pretending to be from IMS
# Outlook mailers often use this Message-ID
header __OUTLOOK_DOLLARS_MSGID MESSAGEID =~ /^<[0-9a-f]{12}\$[0-9a-f]{8}\$[0-9a-f]{8}\@\S+>$/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 && !__OUTLOOK_DOLLARS_MSGID && !__OUTLOOK_DOLLARS_OTHER && !__IMS_MSGID && !__UNUSABLE_MSGID)
# use new meta rules to implement FORGED_MUA_OUTLOOK rule from 2.60
meta FORGED_MUA_OUTLOOK (__FORGED_OE || __FORGED_OUTLOOK_DOLLARS)
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]{26}A[AB]\.[-_\w.]+\@\S+>$/m
meta FORGED_MUA_OIMO (__OIMO_MUA && !__OIMO_MSGID && !__OUTLOOK_DOLLARS_MSGID && !__UNUSABLE_MSGID)
describe FORGED_MUA_OIMO Forged mail pretending to be from MS Outlook IMO
# QUALCOMM Eudora
# Note: uses X_LOOP and X_MAILING_LIST as subrules
# X-Mailer: QUALCOMM Windows Eudora Version 5.0 (and 5.1)
# X-Mailer: QUALCOMM Windows Eudora Version 6.0.0.22
# updated to fix bugs 2047, 2598, 2654
# NOTE: this is the *only* spammish Eudora MUA pattern that wasn't
# ignored using __OLD_EUDORA1 and __OLD_EUDORA2 under previous rules.
header __EUDORA_MUA X-Mailer =~ /^QUALCOMM Windows Eudora (?:Pro |Light )?Version [3456]\./
header __EUDORA_MSGID MESSAGEID =~ /^<(?:\d\d?\.){3,5}\d{14}\.[a-f0-9]{8}\@\S+(?:\sport\s\d+)?>$/m
header __HAS_X_LOOP exists:X-Loop
header __HAS_X_MAILING_LIST exists:X-Mailing-List
meta FORGED_MUA_EUDORA (__EUDORA_MUA && !__EUDORA_MSGID && !__UNUSABLE_MSGID && !__HAS_X_LOOP && !__HAS_X_MAILING_LIST)
describe FORGED_MUA_EUDORA Forged mail pretending to be from Eudora
# Mar 26 2003 jm: AOL MUAs add a Received line, and do not use "real names" in
# From or To headers, as far as I can see, quinlan: also see bug 1426
header __AOL_FROM From:addr =~ /\@aol\.com$/i
meta FORGED_MUA_AOL_FROM (__AOL_MUA && !__AOL_FROM)
describe FORGED_MUA_AOL_FROM Forged mail pretending to be from AOL (by From)
# 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}/
header __MAILMAN_21 X-Mailman-Version =~ /\d/
meta FORGED_MUA_THEBAT_CS (__THEBAT_MUA && __CTYPE_CHARSET_QUOTED)
meta FORGED_MUA_THEBAT_BOUN (__THEBAT_MUA_V1 && __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)
meta FORGED_OUTLOOK_HTML (__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 (__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 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"?
header __X_MAILER_APPLEMAIL X-Mailer =~ /^Apple Mail \(\d\.\d+\)$/
header __MSGID_APPLEMAIL Message-Id =~ /^<[0-9A-F]{8}-(?:[0-9A-F]{4}-){3}[0-9A-F]{12}\@\S+>$/
header __MIME_VERSION_APPLEMAIL Mime-Version =~ /^1\.0 \(Apple Message framework v\d+\)$/
meta __USER_AGENT_APPLEMAIL !__CTYPE_HTML && __X_MAILER_APPLEMAIL && (__MSGID_APPLEMAIL || __MIME_VERSION_APPLEMAIL)
# 2003-02-23: quinlan
# some useful meta rule sub-elements
body __MIME_HTML eval:check_for_mime_html()
header __CTYPE_HTML Content-Type =~ /text\/html/i
header __ANY_AOL_MUA X-Mailer =~ /^AOL\b/
header __ANY_IMS_MUA X-Mailer =~ /^Internet Mail Service\b/
header __ANY_OUTLOOK_MUA X-Mailer =~ /^Microsoft Outlook\b/
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')
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_AOL_TAGS (__ANY_AOL_MUA && __MIME_HTML && !__TAG_EXISTS_HTML)
describe FORGED_AOL_TAGS AOL mailers can't send HTML in this format
meta FORGED_IMS_TAGS (__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 (__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]+(?-i:l)\d+/i
describe RATWARE_HASH_DASH Contains a hashbuster in Send-Safe format
# spammer tool, sometimes has "netIP with HTTP;" in Received: header
header RATWARE_NETIP Content-Type =~ /boundary="--ALT--[A-Z]{4}\d/
describe RATWARE_NETIP Bulk email fingerprint (netIP) found
# this is really badly faked. Also the spammer who uses "25250101"
# for the build is a total hippie.
header RATWARE_GECKO_BUILD User-Agent =~ /Gecko\/(?!200\d\d\d\d\d)\d/
describe RATWARE_GECKO_BUILD Bulk email fingerprint (Gecko faked) found
########################################################################
# Most ratware uses message templates I would guess.
# Here's two popular ones...
header HDR_ORDER_MTSRIX ALL =~ /\nMessage-ID: <\S+@\S+>\nTo: [^\n]+ <\S+>\nSubject: [^\n]+\nReferences: <\S+@\S+>\nIn-Reply-To: <\S+@\S+>\nX-Mailer: /
describe HDR_ORDER_MTSRIX Headers are in order found in spam (MTSRIX)
header HDR_ORDER_TRIMRS ALL =~ /\nTo: [^\n]+\nReferences: <\S+@\S+>\nIn-Reply-To: <\S+@\S+>\nMessage-ID: <\S+@\S+>\nReply-To: [^\n]+\nSender: /
describe HDR_ORDER_TRIMRS Headers are in order found in spam (TRIMRS)
########################################################################
# 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 RCVD_BONUS_SPC_DATE Received =~ /with SMTP; \d\d \S\S\S /
describe RCVD_BONUS_SPC_DATE Bulk email fingerprint (bonus space) found
header X_MESSAGE_INFO exists:X-Message-Info
describe X_MESSAGE_INFO Bulk email fingerprint (X-Message-Info) 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