/usr/share/spamassassin/25_dkim.cf is in spamassassin 3.4.1-8build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 | # SpamAssassin - DKIM rules
#
# 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>
#
###########################################################################
# Requires the Mail::SpamAssassin::Plugin::DKIM plugin be loaded.
ifplugin Mail::SpamAssassin::Plugin::DKIM
full DKIM_SIGNED eval:check_dkim_signed()
full DKIM_VALID eval:check_dkim_valid()
full DKIM_VALID_AU eval:check_dkim_valid_author_sig()
full __DKIM_DEPENDABLE eval:check_dkim_dependable()
header DKIM_ADSP_NXDOMAIN eval:check_dkim_adsp('N')
header DKIM_ADSP_DISCARD eval:check_dkim_adsp('D')
header DKIM_ADSP_ALL eval:check_dkim_adsp('A')
header DKIM_ADSP_CUSTOM_LOW eval:check_dkim_adsp('1')
header DKIM_ADSP_CUSTOM_MED eval:check_dkim_adsp('2')
header DKIM_ADSP_CUSTOM_HIGH eval:check_dkim_adsp('3')
# Note: DKIM_SIGNED, DKIM_VALID and DKIM_VALID_AU are mainly informational
# rules, and can serve as a basis for meta rules; it is not difficult for a
# sender to cause hits on them or to prevent them from firing, so their score
# should be kept low.
tflags DKIM_SIGNED net
tflags DKIM_VALID net nice
tflags DKIM_VALID_AU net nice
tflags DKIM_ADSP_NXDOMAIN net
tflags DKIM_ADSP_DISCARD net
tflags DKIM_ADSP_ALL net
tflags DKIM_ADSP_CUSTOM_LOW net userconf
tflags DKIM_ADSP_CUSTOM_MED net userconf
tflags DKIM_ADSP_CUSTOM_HIGH net userconf
describe DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid
describe DKIM_VALID Message has at least one valid DKIM or DK signature
describe DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain
describe __DKIM_DEPENDABLE A validation failure not attributable to truncation
describe DKIM_ADSP_NXDOMAIN No valid author signature and domain not in DNS
describe DKIM_ADSP_DISCARD No valid author signature, domain signs all mail and suggests discarding the rest
describe DKIM_ADSP_ALL No valid author signature, domain signs all mail
describe DKIM_ADSP_CUSTOM_LOW No valid author signature, adsp_override is CUSTOM_LOW
describe DKIM_ADSP_CUSTOM_MED No valid author signature, adsp_override is CUSTOM_MED
describe DKIM_ADSP_CUSTOM_HIGH No valid author signature, adsp_override is CUSTOM_HIGH
full __RESIGNER1 eval:check_dkim_valid('linkedin.com')
full __RESIGNER2 eval:check_dkim_valid('googlegroups.com','yahoogroups.com','yahoogroups.de')
tflags __RESIGNER1 net
tflags __RESIGNER2 net
meta __VIA_RESIGNER __RESIGNER1 || __RESIGNER2
describe __VIA_RESIGNER Mail through a popular signing remailer
meta NML_ADSP_CUSTOM_LOW DKIM_ADSP_CUSTOM_LOW && !__VIA_ML && !__VIA_RESIGNER
meta NML_ADSP_CUSTOM_MED DKIM_ADSP_CUSTOM_MED && !__VIA_ML && !__VIA_RESIGNER
meta NML_ADSP_CUSTOM_HIGH DKIM_ADSP_CUSTOM_HIGH && !__VIA_ML && !__VIA_RESIGNER
describe NML_ADSP_CUSTOM_LOW ADSP custom_low hit, and not from a mailing list
describe NML_ADSP_CUSTOM_MED ADSP custom_med hit, and not from a mailing list
describe NML_ADSP_CUSTOM_HIGH ADSP custom_high hit, and not from a mailing list
# old, declared for compatibility with pre-3.3, should have scores 0
full DKIM_VERIFIED eval:check_dkim_valid()
header DKIM_POLICY_TESTING eval:check_dkim_testing()
header DKIM_POLICY_SIGNSOME eval:check_dkim_signsome()
header DKIM_POLICY_SIGNALL eval:check_dkim_signall()
tflags DKIM_VERIFIED net nice
tflags DKIM_POLICY_SIGNSOME net nice
tflags DKIM_POLICY_SIGNALL net nice
tflags DKIM_POLICY_TESTING net nice
endif # Mail::SpamAssassin::Plugin::DKIM
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