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# SpamAssassin rules file: meta tests
#
# 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.
#
# Add meta tests which cover *both* headers and body here.
#
# Note: body tests are run with long lines, so be sure to limit the
# size of searches; use /.{0,30}/ instead of /.*/ to avoid huge
# search times.
#
# <@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 3.004006

# some tests that will trigger FPs on ISO-2022-JP mails.

body __ISO_2022_JP_DELIM	/\e\$B/

meta UPPERCASE_50_75            (!__ISO_2022_JP_DELIM && __UPPERCASE_50_75)
describe UPPERCASE_50_75        message body is 50-75% uppercase
meta UPPERCASE_75_100           (!__ISO_2022_JP_DELIM && __UPPERCASE_75_100)
describe UPPERCASE_75_100       message body is 75-100% uppercase

header __SANE_MSGID		MESSAGEID =~ /^<[^<>\\ \t\n\r\x0b\x80-\xff]+\@[^<>\\ \t\n\r\x0b\x80-\xff]+>\s*$/m
header __HAS_MSGID		MESSAGEID =~ /\S/
header __MSGID_COMMENT		MESSAGEID =~ /$.*$/m
meta INVALID_MSGID		__HAS_MSGID && !(__SANE_MSGID || __MSGID_COMMENT)
describe INVALID_MSGID		Message-Id is not valid, according to RFC 2822

#See Bug 7411
#header __MOZILLA_MUA		X-Mailer =~ /\bMozilla\b/
header __MOZILLA_MUA            User-Agent =~ /^mozilla\b/i
header __MOZILLA_MSGID		MESSAGEID =~ /^<(?:[a-f\d]{8}-(?:[a-f\d]{4}-){3}[a-f\d]{12}|[A-F\d]{8}\.[A-F1-9][A-F\d]{0,7})\@\S+>$/m
meta FORGED_MUA_MOZILLA		(__MOZILLA_MUA && !__UNUSABLE_MSGID && !__MOZILLA_MSGID)
describe FORGED_MUA_MOZILLA	Forged mail pretending to be from Mozilla

header __PC_RND_HEADER		ALL =~ /%RA?ND(?:OM)?(?:_|\b|[A-Z]{3})/i
rawbody __PC_RND_RAWBODY	/%RA?ND(?:OM)?(?:_|\b|[A-Z]{3})/i
meta PERCENT_RANDOM		(__PC_RND_HEADER || __PC_RND_RAWBODY)
describe PERCENT_RANDOM		Message has a random macro in it

# __MIME_ATTACHMENT defined in 20_html_tests.cf
body __NONEMPTY_BODY	/\S/
tflags __NONEMPTY_BODY	nosubject
priority __NONEMPTY_BODY -2000 # Bug 8078
meta EMPTY_MESSAGE	!__MIME_ATTACHMENT && !__NONEMPTY_BODY
describe EMPTY_MESSAGE	Message appears to have no textual parts

meta NO_HEADERS_MESSAGE (MISSING_DATE && MISSING_HEADERS && NO_RECEIVED && NO_RELAYS && MISSING_MID)
describe NO_HEADERS_MESSAGE Message appears to be missing most RFC-822 headers

###########################################################################

ifplugin Mail::SpamAssassin::Plugin::MIMEEval

body __UPPERCASE_25_50          eval:check_for_uppercase('25', '50')
body __UPPERCASE_50_75          eval:check_for_uppercase('50', '75')
body __UPPERCASE_75_100         eval:check_for_uppercase('75', '100')

endif

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✏️ 20_meta_tests.cf