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# SpamAssassin rules file: fake-HELO tests
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# Please don't modify this file as your changes will be overwritten with
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# the next update. Use @@LOCAL_RULES_DIR@@/local.cf instead.
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# See 'perldoc Mail::SpamAssassin::Conf' for details.
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# We should write a new ruletype for these, to save typing.
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to you under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at:
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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###########################################################################
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require_version @@VERSION@@
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# ---------------------------------------------------------------------------
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# Suresh says: these will never be used as HELOs from real mail.com relays.
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# Just check the most recent handover; the connection to a trusted host.
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# This way a legit sender can send to their MSA using that HELO (quite a few
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# MUAs will do that), but a spammer gets caught. (List of domains comes from
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# the drop-down list on the Mail.com signup page.)
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header FAKE_HELO_MAIL_COM_DOM X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=(?:\S+\.|)(?:(?:mail|email|iname|cheerful|consultant|europe|mindless|myself|post|techie|usa|writeme|2die4|artlover|bikerider|catlover|cliffhanger|cutey|doglover|gardener|hot-shot|inorbit|loveable|mad\.scientist|playful|poetic|popstar|saintly|seductive|soon|whoever|winning|witty|yours|africamail|arcticmail|asia|australiamail|europe|japan|samerica|usa|berlin|dublin|london|madrid|moscowmail|munich|nycmail|paris|rome|sanfranmail|singapore|tokyo|accountant|adexec|allergist|alumnidirector|archaeologist|chemist|clerk|columnist|comic|consultant|counsellor|deliveryman|diplomats|doctor|dr|engineer|execs|financier|geologist|graphic-designer|insurer|journalist|lawyer|legislator|lobbyist|minister|optician|pediatrician|presidency|priest|publicist|realtyagent|registerednurses|repairman|representative|rescueteam|scientist|sociologist|teacher|techietechnologist|umpire)\.com|(?:programmer|earthling|hairdresser)\.net|musician\.org) /i
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describe FAKE_HELO_MAIL_COM_DOM Relay HELO'd with suspicious hostname (mail.com)
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# ---------------------------------------------------------------------------
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# Interesting new feature; spamware HELO'ing, from a dialup IP addr,
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# using that IP's rDNS entry. We can catch this easily. There aren't
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# many legit mailservers calling themselves
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# 'dhcp024-210-034-053.columbus.rr.com'. ;)
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# Note the '^[^\]]+ ' stanza: this ensures that we only match spamware
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# connecting to a trusted relay; if a mail came from a dynamic addr but
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# was relayed through their smarthost, that's fine.
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# dhcp024-210-034-053.columbus.rr.com [24.210.34.53]
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# c-66-176-16-108.se.client2.attbi.com [66.176.16.108]
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# c-67-168-174-61.client.comcast.net [67.168.174.61]
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# NNN-NNN-NNN-NNN.fibertel.com.ar
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# NN.NN.NNN.NNN.ap.yournet.ne.jp
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# NN.NNN.NN-NN.rev.gaoland.net
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# vaise-1-82-67-44-166.fbx.proxad.net [82.67.44.166]
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# lns-vlq-11-62-147-186-141.adsl.proxad.net [62.147.186.141]
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# dsl-200-95-109-107.prod-infinitum.com.mx [200.95.109.107]
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# port-212-202-77-203.reverse.qsc.de [212.202.77.203]
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# pool-151-203-32-68.bos.east.verizon.net [151.203.32.68]
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# c-67-164-133-216.client.comcast.net [67.164.133.216]
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# 200-171-228-6.customer.telesp.net.br [200.171.228.6]
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# modemcable090.28-201-24.mc.videotron.ca [24.201.28.90]
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# 80-218-47-160.dclient.hispeed.ch [80.218.47.160]
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# cdm-68-226-239-16.laft.cox-internet.com [68.226.239.16]
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# d53-64-35-171.nap.wideopenwest.com [64.53.171.35]
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# 74.67-201-80.adsl.skynet.be [80.201.67.74]
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# 12-218-225-223.client.mchsi.com [12.218.225.223]
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# (require an alpha first, as legit HELO'ing-as-IP-address is hit otherwise)
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header HELO_DYNAMIC_IPADDR X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=[a-z]\S*\d+[^\d\s]\d+[^\d\s]\d+[^\d\s]\d+[^\d\s][^\.]*\.\S+\.\S+[^\]]+ auth= /i
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describe HELO_DYNAMIC_IPADDR Relay HELO'd using suspicious hostname (IP addr 1)
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# dhcp024-210-034-053.columbus.rr.com [24.210.34.53]
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# catv-506237d8.miskcatv.broadband.hu [80.98.55.216]
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# node-c-8b22.a2000.nl
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# cm89.omega139.maxonline.com.sg
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# cm114.gamma208.maxonline.com.sg
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header HELO_DYNAMIC_DHCP X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=\S*(?:(?<!a)cm|catv|docsis|cable|dsl|dhcp|cpe|node)\S*\d+[^\d\s]+\d+[^\]]+ auth= /i
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describe HELO_DYNAMIC_DHCP Relay HELO'd using suspicious hostname (DHCP)
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# fia83-8.dsl.hccnet.nl [62.251.8.83]
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# fia160-115-100.dsl.hccnet.nl [80.100.115.160]
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header HELO_DYNAMIC_HCC X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=\S*\d+[^\d\s]+\d+\S*\.(?:docsis|cable|dsl|adsl|dhcp|cpe)\.[^\]]+ auth= /i
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describe HELO_DYNAMIC_HCC Relay HELO'd using suspicious hostname (HCC)
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# h0002a5d76857.ne.client2.attbi.com [65.96.12.59]
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# CPE0004e2372711-CM000a73666706.cpe.net.cable.rogers.com
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# CPE00e0184f0eba-CM014490118324.cpe.net.cable.rogers.com [24.43.109.140]
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header HELO_DYNAMIC_ROGERS X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=CPE\d+\S+\.rogers\.com[^\]]+ auth= /i
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describe HELO_DYNAMIC_ROGERS Relay HELO'd using suspicious hostname (Rogers)
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# pD9E4F89F.dip.t-dialin.net [217.228.248.159]
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header HELO_DYNAMIC_DIALIN X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=[a-z][A-F0-9]+\.dip\./
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describe HELO_DYNAMIC_DIALIN Relay HELO'd using suspicious hostname (T-Dialin)
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# 0xd5aaf40b.dhcp.kabelnettet.dk
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# 0x50a46949.virnxx11.adsl-dhcp.tele.dk
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header HELO_DYNAMIC_HEXIP X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=0x[a-f0-9]{8}\./
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describe HELO_DYNAMIC_HEXIP Relay HELO'd using suspicious hostname (Hex IP)
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# 118.Red-80-35-201.pooles.rima-tde.net
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header HELO_DYNAMIC_SPLIT_IP X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=\d+\.\S+\d+[^\d\s]\d+[^\d\s]\d+[^\d\s]/
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describe HELO_DYNAMIC_SPLIT_IP Relay HELO'd using suspicious hostname (Split IP)
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# YahooBB219173000034.bbtec.net [219.173.0.34]
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header HELO_DYNAMIC_IPADDR2 X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=\d+[^\d\s]\d+[^\d\s]\d+[^\d\s]\d+[^\d\s][^\.]*\.\S+\.\S+[^\]]+ auth= /i
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describe HELO_DYNAMIC_IPADDR2 Relay HELO'd using suspicious hostname (IP addr 2)
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# h234n2fls32o895.telia.com [217.208.73.234]
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# h53n2fls32o828.telia.com
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# h116n2fls32o1111.telia.com
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# h29n1fls306o1003.telia.com
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# CM-vina5-168-207.cm.vtr.net [200.104.168.207]
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# CM-anto1-98-153.cm.vtr.net [200.104.98.153]
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# ec9z5l.cm.chello.no
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# g225174.upc-g.chello.nl
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# a151145.upc-a.chello.nl
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# a96134.upc-a.chello.nl
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header HELO_DYNAMIC_CHELLO_NL X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=[a-z]\d+\.upc-[a-z]\.chello\.nl[^\]]+ auth= /i
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describe HELO_DYNAMIC_CHELLO_NL Relay HELO'd using suspicious hostname (Chello.nl)
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# cp160000-a.mill1.nb.home.nl
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# cp341468-b.venra1.lb.home.nl
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header HELO_DYNAMIC_HOME_NL X-Spam-Relays-Untrusted =~ /^[^\]]+ helo=[a-z]{2}\d+-\S\.\S+\d\.[a-z]{2}\.home\.nl[^]]+ auth= /i
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describe HELO_DYNAMIC_HOME_NL Relay HELO'd using suspicious hostname (Home.nl)
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###########################################################################
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ifplugin Mail::SpamAssassin::Plugin::RelayEval
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header FAKE_HELO_MSN eval:check_for_rdns_helo_mismatch("msn\.com","msn\.com")
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describe FAKE_HELO_MSN Host HELO did not match rDNS: msn.com
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header FAKE_HELO_MAIL_COM eval:check_for_rdns_helo_mismatch("mail\.com","mail\.com")
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describe FAKE_HELO_MAIL_COM Host HELO did not match rDNS: mail.com
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header FAKE_HELO_EMAIL_COM eval:check_for_rdns_helo_mismatch("email\.com","email\.com")
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describe FAKE_HELO_EMAIL_COM Host HELO did not match rDNS: email.com
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header FAKE_HELO_EXCITE eval:check_for_rdns_helo_mismatch("excite\S*","excite\.com")
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describe FAKE_HELO_EXCITE Host HELO did not match rDNS: excite.com
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header FAKE_HELO_LYCOS eval:check_for_rdns_helo_mismatch("lycos\S*","lycos\.com")
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describe FAKE_HELO_LYCOS Host HELO did not match rDNS: lycos.com
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header FAKE_HELO_YAHOO_CA eval:check_for_rdns_helo_mismatch("yahoo\.ca","yahoo\.ca")
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describe FAKE_HELO_YAHOO_CA Host HELO did not match rDNS: yahoo.ca