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# SpamAssassin rules file: dynamic-ish rDNS tests
#
# 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.
#
# We should write a new ruletype for these, to save typing.
#
# <@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>
#
###########################################################################
require_version @@VERSION@@
# ---------------------------------------------------------------------------
# Note the '^[^\]]+ ' stanza: this ensures that we only match spamware
# connecting to a internal relay; if a mail came from a dynamic addr but
# was relayed through their smarthost, that's fine.
# See bug #5856, all references of "trusted" were changed to "external"
# All of the RDNS_DYNAMIC rules require that the last external relay
# did not use SMTP authentication. These rules should not be firing on
# friendlies!
header __LAST_UNTRUSTED_RELAY_NO_AUTH X-Spam-Relays-Untrusted =~ /^[^\]]+ auth= /
header __LAST_EXTERNAL_RELAY_NO_AUTH X-Spam-Relays-External =~ /^[^\]]+ auth= /
# dhcp024-210-034-053.columbus.rr.com [24.210.34.53]
# c-66-176-16-108.se.client2.attbi.com [66.176.16.108]
# c-67-168-174-61.client.comcast.net [67.168.174.61]
# NNN-NNN-NNN-NNN.fibertel.com.ar
# NN.NN.NNN.NNN.ap.yournet.ne.jp
# NN.NNN.NN-NN.rev.gaoland.net
# vaise-1-82-67-44-166.fbx.proxad.net [82.67.44.166]
# lns-vlq-11-62-147-186-141.adsl.proxad.net [62.147.186.141]
# dsl-200-95-109-107.prod-infinitum.com.mx [200.95.109.107]
# port-212-202-77-203.reverse.qsc.de [212.202.77.203]
# pool-151-203-32-68.bos.east.verizon.net [151.203.32.68]
# c-67-164-133-216.client.comcast.net [67.164.133.216]
# 200-171-228-6.customer.telesp.net.br [200.171.228.6]
# modemcable090.28-201-24.mc.videotron.ca [24.201.28.90]
# 80-218-47-160.dclient.hispeed.ch [80.218.47.160]
# cdm-68-226-239-16.laft.cox-internet.com [68.226.239.16]
# d53-64-35-171.nap.wideopenwest.com [64.53.171.35]
# 74.67-201-80.adsl.skynet.be [80.201.67.74]
# 12-218-225-223.client.mchsi.com [12.218.225.223]
# pptp-81-30-186-139.ufanet.ru [81.30.186.139]
# (require an alpha first, as legit HELO'ing-as-IP-address is hit otherwise)
header __RDNS_DYNAMIC_IPADDR X-Spam-Relays-External =~ /^[^\]]+ rdns=(?![^\s\]]+[-.]static[-.])\S*\d+[^\d\s]\d+[^\d\s]\d+[^\d\s]\d+\S*\.\S+\.\S/i
describe __RDNS_DYNAMIC_IPADDR Relay HELO'd using suspicious hostname (IP addr 1)
# dhcp024-210-034-053.columbus.rr.com [24.210.34.53]
# catv-506237d8.miskcatv.broadband.hu [80.98.55.216]
# node-c-8b22.a2000.nl
# cm89.omega139.maxonline.com.sg
# cm114.gamma208.maxonline.com.sg
header __RDNS_DYNAMIC_DHCP X-Spam-Relays-External =~ /^[^\]]+ rdns=\S*(?:cm|catv|docsis|cable|dsl|dhcp|cpe|node)\S*\d+[^\d\s]+\d/i
describe __RDNS_DYNAMIC_DHCP Relay HELO'd using suspicious hostname (DHCP)
# fia83-8.dsl.hccnet.nl [62.251.8.83]
# fia160-115-100.dsl.hccnet.nl [80.100.115.160]
header __RDNS_DYNAMIC_HCC X-Spam-Relays-External =~ /^[^\]]+ rdns=\S*\d+[^\d\s]+\d+\S*\.(?:docsis|cable|dsl|adsl|dhcp|cpe)\./i
describe __RDNS_DYNAMIC_HCC Relay HELO'd using suspicious hostname (HCC)
# h0002a5d76857.ne.client2.attbi.com [65.96.12.59]
header __RDNS_DYNAMIC_ATTBI X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+\d+\S+\.client2\.attbi\.com/i
describe __RDNS_DYNAMIC_ATTBI Relay HELO'd using suspicious hostname (ATTBI.com)
# CPE0004e2372711-CM000a73666706.cpe.net.cable.rogers.com
# CPE00e0184f0eba-CM014490118324.cpe.net.cable.rogers.com [24.43.109.140]
header __RDNS_DYNAMIC_ROGERS X-Spam-Relays-External =~ /^[^\]]+ rdns=CPE\d+\S+\.rogers\.com/i
describe __RDNS_DYNAMIC_ROGERS Relay HELO'd using suspicious hostname (Rogers)
# ca-morpark-cuda1-zone7-b-159.vnnyca.adelphia.net[67.23.129.159]
# tn-greenvillecuda1cable7a-36.atlaga.adelphia.net [68.171.113.36]
# ky-richmond2a-123.rhmdky.adelphia.net [68.71.36.123]
# ny-lackawannacadent4-chtwga3a-b-117.buf.adelphia.net [68.71.205.117]
# fl-edel-u2-c3c-233.pbc.adelphia.net [68.64.89.233]
header __RDNS_DYNAMIC_ADELPHIA X-Spam-Relays-External =~ /^[^\]]+ rdns=[a-z]{2}-\S+-\d{1,3}\.[a-z]{3,8}\.adelphia\.net/i
describe __RDNS_DYNAMIC_ADELPHIA Relay HELO'd using suspicious hostname (Adelphia)
# pD9E4F89F.dip.t-dialin.net [217.228.248.159]
header __RDNS_DYNAMIC_DIALIN X-Spam-Relays-External =~ /^[^\]]+ rdns=[a-z][A-F0-9]+\.dip\./
describe __RDNS_DYNAMIC_DIALIN Relay HELO'd using suspicious hostname (T-Dialin)
# 0xd5aaf40b.dhcp.kabelnettet.dk
# 0x50a46949.virnxx11.adsl-dhcp.tele.dk
header __RDNS_DYNAMIC_HEXIP X-Spam-Relays-External =~ /^[^\]]+ rdns=0x[a-f0-9]{8}\./
describe __RDNS_DYNAMIC_HEXIP Relay HELO'd using suspicious hostname (Hex IP)
# 118.Red-80-35-201.pooles.rima-tde.net
header __RDNS_DYNAMIC_SPLIT_IP X-Spam-Relays-External =~ /^[^\]]+ rdns=\d+\.\S+\d+[^\d\s]\d+[^\d\s]\d+[^\d\s]/
describe __RDNS_DYNAMIC_SPLIT_IP Relay HELO'd using suspicious hostname (Split IP)
# YahooBB219173000034.bbtec.net [219.173.0.34]
header __RDNS_DYNAMIC_YAHOOBB X-Spam-Relays-External =~ /^[^\]]+ rdns=YahooBB/i
describe __RDNS_DYNAMIC_YAHOOBB Relay HELO'd using suspicious hostname (YahooBB)
# ool-18be1aaf.dyn.optonline.net [24.190.26.175]
header __RDNS_DYNAMIC_OOL X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+\.dyn\.optonline\.net/
describe __RDNS_DYNAMIC_OOL Relay HELO'd using suspicious hostname (OptOnline)
# wiley-170-10231.roadrunner.nf.net [205.251.210.249]
header __RDNS_DYNAMIC_RR2 X-Spam-Relays-External =~ /^[^\]]+ rdns=[a-z]+-\d{1,3}-\d{1,5}\.roadrunner/i
describe __RDNS_DYNAMIC_RR2 Relay HELO'd using suspicious hostname (RR 2)
# pcp04024417pcs.toresd01.pa.comcast.net [68.86.206.126]
# bgp542174bgs.ewndsr01.nj.comcast.net[68.38.144.91]
# Computer-udp135632uds.union01.nj.comcast.net [68.39.99.32]
header __RDNS_DYNAMIC_COMCAST X-Spam-Relays-External =~ /^[^\]]+ rdns=[a-z-]+\d+[a-z]{3}\.[a-z0-9]+\...\.comcast/i
describe __RDNS_DYNAMIC_COMCAST Relay HELO'd using suspicious hostname (Comcast)
# h234n2fls32o895.telia.com [217.208.73.234]
# h53n2fls32o828.telia.com
# h116n2fls32o1111.telia.com
# h29n1fls306o1003.telia.com
header __RDNS_DYNAMIC_TELIA X-Spam-Relays-External =~ /^[^\]]+ rdns=h\d+n\d+fls\S+\.telia\.com/i
describe __RDNS_DYNAMIC_TELIA Relay HELO'd using suspicious hostname (Telia)
# CM-vina5-168-207.cm.vtr.net [200.104.168.207]
# CM-anto1-98-153.cm.vtr.net [200.104.98.153]
header __RDNS_DYNAMIC_VTR X-Spam-Relays-External =~ /^[^\]]+ rdns=cm-[a-z]+\d+-\d+-\d+\.cm\.vtr/i
describe __RDNS_DYNAMIC_VTR Relay HELO'd using suspicious hostname (VTR)
# ec9z5l.cm.chello.no
header __RDNS_DYNAMIC_CHELLO_NO X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+\.cm\.chello\.no/i
describe __RDNS_DYNAMIC_CHELLO_NO Relay HELO'd using suspicious hostname (Chello.no)
# g225174.upc-g.chello.nl
# a151145.upc-a.chello.nl
# a96134.upc-a.chello.nl
header __RDNS_DYNAMIC_CHELLO_NL X-Spam-Relays-External =~ /^[^\]]+ rdns=[a-z]\d+\.upc-[a-z]\.chello\.nl/i
describe __RDNS_DYNAMIC_CHELLO_NL Relay HELO'd using suspicious hostname (Chello.nl)
# MG001182.user.veloxzone.com.br
# ba199058073.user.veloxzone.com.br
header __RDNS_DYNAMIC_VELOX X-Spam-Relays-External =~ /^[^\]]+ rdns=[a-z]{2}\d+\.user\.veloxzone\./i
describe __RDNS_DYNAMIC_VELOX Relay HELO'd using suspicious hostname (Veloxzone)
# public4-seve6-5-cust173.lond.broadband.ntl.com
# spr1-bolt5-5-0-cust9.manc.broadband.ntl.com
# spc1-lewi4-6-0-cust190.lond.broadband.ntl.com
header __RDNS_DYNAMIC_NTL X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+\d+-\d+-cust\d+\.[a-z]{4,6}\.broadband\.ntl\.com/i
describe __RDNS_DYNAMIC_NTL Relay HELO'd using suspicious hostname (NTL)
# (I'm quite sure these may be a good spamsign in future)
# nwblwi-nrp3-l10-a671.nwblwi.tds.net
header __RDNS_DYNAMIC_TDS X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+-[a-z]\d+\.[a-z]{6}\.tds\.net/i
header __RDNS_DYNAMIC_VIRTUA X-Spam-Relays-External =~ /^[^\]]+ rdns=\d+\.cps\./i
# sp1-c700-131.spacelan.ne.jp
header __RDNS_DYNAMIC_SPACELAN X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+-[a-z]\d+-\d+\./i
# rDNS host-type indicators, as per
# https://tools.ietf.org/id/draft-msullivan-dnsop-generic-naming-schemes-00.txt
header __RDNS_INDICATOR_DYN X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+[\-\.]dyn(?:amic)?[\-\.]/i
# surprisingly large ham hitrate
header __RDNS_INDICATOR_TYPE X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+[\-\.](?:dial|modem|isdn|dov|\S?dsl|cable|wireless)[\-\.]/i
# this hits a little ham, not too much though
header __RDNS_INDICATOR_RES X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+[\-\.](?:res|resnet|client)[\-\.]/i
# these are non-standard, but common in the field; 100% spam correlation!
# (I think that's a fluke)
header __RDNS_INDICATOR_TYPE2 X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+[\-\.](?:docsis|dhcp|cpe|catv)[\-\.]/i
# dsl.dynamic8510023760.ttnet.net.tr
header __RDNS_DYNAMIC_TTNET X-Spam-Relays-External =~ /^[^\]]+ rdns=\S+[\-\.]dyn(?:amic)?\d/i
# c221106.ppp.asahi-net.or.jp
# i253064.ppp.asahi-net.or.jp
# u035201.ppp.asahi-net.or.jp
# w158034.ppp.asahi-net.or.jp
header __RDNS_DYNAMIC_ASAHI X-Spam-Relays-External =~ /^[^\]]+ rdns=[a-z][0-9]+\.ppp\.asahi-net\.or\.jp/i
# exceptions (bug 5397):
# exceptions: 66-220-155-151.mail-mail.facebook.com
# exceptions: o167-89-97-77.outbound-mail.sendgrid.net (bug 7592)
header __RDNS_STATIC X-Spam-Relays-External =~ /^[^\]]+ rdns=\S*(?:fix|static|fixip|dedicated|mail\-mail|outbound-mail|smtp)/i
# bug 5586:
header __CGATE_RCVD Received =~ /by \S+ \(CommuniGate Pro/
# bug 5926:
header __DOMINO_RCVD Received =~ /by \S+ \(Lotus Domino /
header __RDNS_NONE X-Spam-Relays-External =~ /^[^\]]+ rdns= /
###########################################################################
meta RDNS_DYNAMIC (__LAST_EXTERNAL_RELAY_NO_AUTH && !__RDNS_STATIC && (__RDNS_DYNAMIC_IPADDR || __RDNS_DYNAMIC_DHCP || __RDNS_DYNAMIC_HCC || __RDNS_DYNAMIC_ATTBI || __RDNS_DYNAMIC_ROGERS || __RDNS_DYNAMIC_ADELPHIA || __RDNS_DYNAMIC_DIALIN || __RDNS_DYNAMIC_HEXIP || __RDNS_DYNAMIC_SPLIT_IP || __RDNS_DYNAMIC_YAHOOBB || __RDNS_DYNAMIC_OOL || __RDNS_DYNAMIC_RR2 || __RDNS_DYNAMIC_COMCAST || __RDNS_DYNAMIC_TELIA || __RDNS_DYNAMIC_VTR || __RDNS_DYNAMIC_CHELLO_NO || __RDNS_DYNAMIC_CHELLO_NL || __RDNS_DYNAMIC_VELOX || __RDNS_DYNAMIC_NTL || __RDNS_DYNAMIC_TDS || __RDNS_DYNAMIC_VIRTUA || __RDNS_DYNAMIC_SPACELAN || __RDNS_INDICATOR_DYN || __RDNS_INDICATOR_RES || __RDNS_INDICATOR_TYPE2 || __RDNS_DYNAMIC_TTNET || __RDNS_DYNAMIC_ASAHI))
describe RDNS_DYNAMIC Delivered to internal network by host with dynamic-looking rDNS
meta RDNS_NONE (__RDNS_NONE && !__CGATE_RCVD && !__DOMINO_RCVD)
describe RDNS_NONE Delivered to internal network by a host with no rDNS