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var
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lib
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spamassassin
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4.000001
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updates_spamassassin_org
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60_adsp_override_dkim.cf
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# SpamAssassin rules file: default DKIM ADSP overrides # # Please don't modify this file as your changes will be overwritten with # the next update. Use /etc/mail/spamassassin/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> ########################################################################### # DKIM ADSP overrides ifplugin Mail::SpamAssassin::Plugin::DKIM # Later rules override previous, so to override any of the pre-sets here, just # declare the domain as unknown, e.g.: 'adsp_override somedomain unknown' . # # 'discardable' is implied in absence of the second argument. adsp_override ebay.com adsp_override ebay.at adsp_override ebay.be adsp_override ebay.ca adsp_override ebay.ch adsp_override ebay.de adsp_override ebay.ee adsp_override ebay.es adsp_override ebay.fr adsp_override ebay.hu adsp_override ebay.ie adsp_override ebay.in adsp_override ebay.it adsp_override ebay.nl adsp_override ebay.ph adsp_override ebay.pl adsp_override ebay.pt adsp_override ebay.se adsp_override ebay.co.kr adsp_override ebay.co.uk adsp_override ebay.com.au adsp_override ebay.com.cn adsp_override ebay.com.hk adsp_override ebay.com.mx adsp_override ebay.com.my adsp_override ebay.com.sq adsp_override paypal.com adsp_override paypal.co.uk adsp_override ealerts.bankofamerica.com adsp_override alert.bankofamerica.com adsp_override americangreetings.com adsp_override yahoo.americangreetings.com adsp_override msn.americangreetings.com adsp_override egreetings.com adsp_override bluemountain.com adsp_override hallmark.com adsp_override update.hallmark.com adsp_override *.hallmark.com adsp_override amazon.com all adsp_override amazon.co.uk all adsp_override amazon.de all adsp_override amazon.fr all adsp_override birthdayalarm.com all adsp_override astrology.com all adsp_override linkedin.com all adsp_override *.linkedin.com all adsp_override facebookmail.com all adsp_override *.greenpeace.org all adsp_override lists.sourceforge.net all adsp_override lufthansa.com all adsp_override *.lufthansa.com all adsp_override *.delivery.net all adsp_override youtube.com custom_high adsp_override google.com custom_med adsp_override gmail.com custom_med adsp_override googlemail.com custom_med adsp_override yahoo.com custom_med adsp_override yahoo.com.ar custom_med adsp_override yahoo.com.au custom_med adsp_override yahoo.com.br custom_med adsp_override yahoo.com.cn custom_med adsp_override yahoo.com.hk custom_med adsp_override yahoo.com.mx custom_med adsp_override yahoo.com.my custom_med adsp_override yahoo.com.ph custom_med adsp_override yahoo.com.sg custom_med adsp_override yahoo.com.tw custom_med adsp_override yahoo.co.id custom_med adsp_override yahoo.co.in custom_med adsp_override yahoo.co.jp custom_med adsp_override yahoo.co.nz custom_med adsp_override yahoo.co.th custom_med adsp_override yahoo.co.uk custom_med adsp_override yahoo.ca custom_med adsp_override yahoo.cn custom_med adsp_override yahoo.de custom_med adsp_override yahoo.dk custom_med adsp_override yahoo.es custom_med adsp_override yahoo.fr custom_med adsp_override yahoo.gr custom_med adsp_override yahoo.ie custom_med adsp_override yahoo.it custom_med adsp_override yahoo.no custom_med adsp_override yahoo.pl custom_med adsp_override yahoo.se custom_med # Ignore linting, makes unnecessary lookups adsp_override compiling.spamassassin.taint.org unknown # To effectively disable ADSP network DNS lookups for all other domains: # adsp_override * unknown # Currently few domains publish their signing practices (draft-ietf-dkim-ssp, # ADSP), partly because the ADSP draft/rfc is rather new, partly because they # think hardly any recipient bothers to check it, and partly for fear that # some recipients might lose mail due to problems in their signature validation # procedures or mail mangling by mailers beyond their control. # # Nevertheless, recipients could benefit by knowing signing practices of a # sending (author's) domain, for example to recognize forged mail claiming # to be from certain domains which are popular targets for phishing, like # financial institutions. Unfortunately, as signing practices are seldom # published or are weak, it is hardly justifiable to look them up in DNS. # # To overcome this chicken-or-the-egg problem, the adsp_override mechanism # allows recipients using SpamAssassin to override published or defaulted # ADSP for certain domains. This makes it possible to manually specify a # stronger (or weaker) signing practices than a signing domain is willing # to publish (explicitly or by default), and also save on a DNS lookup. # # Note that ADSP (published or overridden) is only consulted for messages # which do not contain a valid DKIM signature from the author's domain. # # According to ADSP draft, signing practices can be one of the following: # unknown, all and discardable. # # unknown: Messages from this domain might or might not have an author # signature. This is a default if a domain exists in DNS but no ADSP record # is found. # # all: All messages from this domain are signed with an Author Signature. # # discardable: All messages from this domain are signed with an Author # Signature. If a message arrives without a valid Author Signature, the # domain encourages the recipient(s) to discard it. # # ADSP lookup can also determine that a domain is "out of scope", i.e., the # domain does not exist (NXDOMAIN) in the DNS. # # To override domain's signing practices in a SpamAssassin configuration file, # specify an adsp_override directive for each sending domain to be overridden. # # Its first argument is a domain name. Author's domain is matched against it, # matching is case insensitive. This is not a regular expression or a file-glob # style wildcard, but limited wildcarding is still available: if this argument # starts by a "*." (or is a sole "*"), author's domain matches if it is a # subdomain (to one or more levels) of the argument. Otherwise (with no # leading asterisk) the match must be exact (not a subdomain). # # An optional second parameter is one of the following keywords # (case-insensitive): nxdomain, unknown, all, discardable, # custom_low, custom_med, custom_high. # # Absence of this second parameter implies discardable. If a domain is not # listed by a adsp_override directive nor does it explicitly publish any # ADSP record, then unknown is implied for valid domains, and nxdomain # for domains not existing in DNS. (Note: domain validity may be unchecked # with current versions of Mail::DKIM, so nxdomain may never turn up.) # # The strong setting discardable is useful for domains which are known # to always sign their mail and to always send it directly to recipients # (not to mailing lists), and are frequent targets of fishing attempts, # such as financial institutions. The discardable is also appropriate # for domains which are known never to send any mail. # # When a message does not contain a valid signature by the author's domain # (the domain in a From header field), the signing practices pertaining # to author's domain determine which of the following rules fire and # contributes its score: DKIM_ADSP_NXDOMAIN, DKIM_ADSP_ALL, DKIM_ADSP_DISCARD, # DKIM_ADSP_CUSTOM_LOW, DKIM_ADSP_CUSTOM_MED, DKIM_ADSP_CUSTOM_HIGH. Not more # than one of these rules can fire. The last three can only result from a # 'signing_practices' as given in a adsp_override directive (not from a # DNS lookup), and can serve as a convenient means of providing a different # score if scores assigned to DKIM_ADSP_ALL or DKIM_ADSP_DISCARD are not # considered suitable for some domains. # # As a precaution against firing DKIM_ADSP_* rules when there is a known # local reason for a signature verification failure, the domain's ADSP is # considered unknown when DNS lookups are disabled or a DNS lookup encountered # a temporary problem on fetching a public key from the author's domain. # Similarly, ADSP is considered unknown when this plugin did its own signature # verification (signatures were not passed to SA by a caller) and a metarule # __TRUNCATED was triggered, indicating the caller intentionally passed a # truncated message to SpamAssassin, which was a likely reason for a signature # verification failure. endif # Mail::SpamAssassin::Plugin::DKIM
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