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# SpamAssassin rules file: HTML 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. # # <@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 # HTML parser tests # # please sort these by eval type then name meta HTML_SHORT_LINK_IMG_1 __HTML_LENGTH_0000_1024 && __HTML_LINK_IMAGE meta HTML_SHORT_LINK_IMG_2 __HTML_LENGTH_1024_1536 && __HTML_LINK_IMAGE meta HTML_SHORT_LINK_IMG_3 __HTML_LENGTH_1536_2048 && __HTML_LINK_IMAGE describe HTML_SHORT_LINK_IMG_1 HTML is very short with a linked image describe HTML_SHORT_LINK_IMG_2 HTML is very short with a linked image describe HTML_SHORT_LINK_IMG_3 HTML is very short with a linked image meta HTML_SHORT_CENTER (__HTML_LENGTH_384 && __TAG_EXISTS_CENTER) describe HTML_SHORT_CENTER HTML is very short with CENTER tag meta HTML_TITLE_SUBJ_DIFF __HTML_TITLE_SUBJ_DIFF && !__MIME_ATTACHMENT meta HTML_CHARSET_FARAWAY (__HTML_CHARSET_FARAWAY && __HIGHBITS) describe HTML_CHARSET_FARAWAY A foreign language charset used in HTML markup tflags HTML_CHARSET_FARAWAY userconf meta HTML_MIME_NO_HTML_TAG MIME_HTML_ONLY && !__TAG_EXISTS_HTML describe HTML_MIME_NO_HTML_TAG HTML-only message, but there is no HTML tag meta HTML_MISSING_CTYPE (!__MIME_HTML && HTML_MESSAGE) describe HTML_MISSING_CTYPE Message is HTML without HTML Content-Type ########################################################################### # rawbody HTML tests rawbody HIDE_WIN_STATUS /<[^>]{1,1000}onMouseOver=[^>]{1,1000}window\.status=/i describe HIDE_WIN_STATUS Javascript to hide URLs in browser rawbody __OBFUSCATING_COMMENT_A /\w(?:<![^>]>)+\w/ rawbody __OBFUSCATING_COMMENT_B /[^\s>](?:<![^>]>)+[^\s<]/ ifplugin Mail::SpamAssassin::Plugin::HTMLEval ifplugin Mail::SpamAssassin::Plugin::MIMEEval meta OBFUSCATING_COMMENT ((__OBFUSCATING_COMMENT_A && HTML_MESSAGE) \|\| (__OBFUSCATING_COMMENT_B && MIME_HTML_ONLY)) && !__ISO_2022_JP_DELIM describe OBFUSCATING_COMMENT HTML comments which obfuscate text endif endif # spams that are assembled from a Javascript array # look for the XOR op rawbody __JS_FROMCHARCODE /String\.fromCharCode\s\(\s\S+\s\[\s\S+\s\]\s\^/ rawbody __JS_DOCWRITE /document\.write/ meta JS_FROMCHARCODE (__JS_FROMCHARCODE && __JS_DOCWRITE) describe JS_FROMCHARCODE Document is built from a Javascript charcode array # a good possible rule that may resurface # ! $ % ' ( ) , - . / : ; = ? @ _ #rawbody ENTITY_DEC_OTHER /\&\#0(?:3[3679]\|4[014567]\|5[89]\|6[134]\|95)\;/ #describe ENTITY_DEC_OTHER HTML contains needlessly encoded punctuation body __HIGHBITS /(?:[\x80-\xff].?){4}/ # note: __HIGHBITS is used by HTML_CHARSET_FARAWAY ########################################################################### ifplugin Mail::SpamAssassin::Plugin::HTMLEval # HTML control test, HTML spam rules should all have better S/O than this body HTML_MESSAGE eval:html_test('html') describe HTML_MESSAGE HTML included in message # HTML comment tests body HTML_COMMENT_SHORT eval:html_text_match('comment', '<!(?!-).{0,6}>') describe HTML_COMMENT_SHORT HTML comment is very short body HTML_COMMENT_SAVED_URL eval:html_text_match('comment', '<!-- saved from url=$\d{4}$') describe HTML_COMMENT_SAVED_URL HTML message is a saved web page body HTML_EMBEDS eval:html_test('embeds') describe HTML_EMBEDS HTML with embedded plugin object body HTML_EXTRA_CLOSE eval:html_range('closed_extra_ratio', '0.09', 'inf') describe HTML_EXTRA_CLOSE HTML contains far too many close tags body HTML_FONT_SIZE_LARGE eval:html_range('max_size', '5', '6') describe HTML_FONT_SIZE_LARGE HTML font size is large body HTML_FONT_SIZE_HUGE eval:html_range('max_size', '6', 'inf') describe HTML_FONT_SIZE_HUGE HTML font size is huge body HTML_FONT_LOW_CONTRAST eval:html_test('font_low_contrast') describe HTML_FONT_LOW_CONTRAST HTML font color similar or identical to background body HTML_FONT_FACE_BAD eval:html_test('font_face_bad') describe HTML_FONT_FACE_BAD HTML font face is not a word body HTML_FORMACTION_MAILTO eval:html_test('form_action_mailto') describe HTML_FORMACTION_MAILTO HTML includes a form which sends mail # HTML_IMAGE_ONLY - not much raw HTML with images (absolute) body HTML_IMAGE_ONLY_04 eval:html_image_only('0000','0400') body HTML_IMAGE_ONLY_08 eval:html_image_only('0400','0800') body HTML_IMAGE_ONLY_12 eval:html_image_only('0800','1200') body HTML_IMAGE_ONLY_16 eval:html_image_only('1200','1600') body HTML_IMAGE_ONLY_20 eval:html_image_only('1600','2000') body HTML_IMAGE_ONLY_24 eval:html_image_only('2000','2400') body HTML_IMAGE_ONLY_28 eval:html_image_only('2400','2800') body HTML_IMAGE_ONLY_32 eval:html_image_only('2800','3200') describe HTML_IMAGE_ONLY_04 HTML: images with 0-400 bytes of words describe HTML_IMAGE_ONLY_08 HTML: images with 400-800 bytes of words describe HTML_IMAGE_ONLY_12 HTML: images with 800-1200 bytes of words describe HTML_IMAGE_ONLY_16 HTML: images with 1200-1600 bytes of words describe HTML_IMAGE_ONLY_20 HTML: images with 1600-2000 bytes of words describe HTML_IMAGE_ONLY_24 HTML: images with 2000-2400 bytes of words describe HTML_IMAGE_ONLY_28 HTML: images with 2400-2800 bytes of words describe HTML_IMAGE_ONLY_32 HTML: images with 2800-3200 bytes of words # HTML_IMAGE_RATIO - more image area than text (ratio) body HTML_IMAGE_RATIO_02 eval:html_image_ratio('0.000','0.002') body HTML_IMAGE_RATIO_04 eval:html_image_ratio('0.002','0.004') body HTML_IMAGE_RATIO_06 eval:html_image_ratio('0.004','0.006') body HTML_IMAGE_RATIO_08 eval:html_image_ratio('0.006','0.008') describe HTML_IMAGE_RATIO_02 HTML has a low ratio of text to image area describe HTML_IMAGE_RATIO_04 HTML has a low ratio of text to image area describe HTML_IMAGE_RATIO_06 HTML has a low ratio of text to image area describe HTML_IMAGE_RATIO_08 HTML has a low ratio of text to image area # HTML obfuscation body HTML_OBFUSCATE_05_10 eval:html_range('obfuscation_ratio','.05','.1') body HTML_OBFUSCATE_10_20 eval:html_range('obfuscation_ratio','.1','.2') body HTML_OBFUSCATE_20_30 eval:html_range('obfuscation_ratio','.2','.3') body HTML_OBFUSCATE_30_40 eval:html_range('obfuscation_ratio','.3','.4') body HTML_OBFUSCATE_50_60 eval:html_range('obfuscation_ratio','.5','.6') body HTML_OBFUSCATE_70_80 eval:html_range('obfuscation_ratio','.7','.8') body HTML_OBFUSCATE_90_100 eval:html_range('obfuscation_ratio','.9','1.0') describe HTML_OBFUSCATE_05_10 Message is 5% to 10% HTML obfuscation describe HTML_OBFUSCATE_10_20 Message is 10% to 20% HTML obfuscation describe HTML_OBFUSCATE_20_30 Message is 20% to 30% HTML obfuscation describe HTML_OBFUSCATE_30_40 Message is 30% to 40% HTML obfuscation describe HTML_OBFUSCATE_50_60 Message is 50% to 60% HTML obfuscation describe HTML_OBFUSCATE_70_80 Message is 70% to 80% HTML obfuscation describe HTML_OBFUSCATE_90_100 Message is 90% to 100% HTML obfuscation body HTML_TAG_BALANCE_BODY eval:html_tag_balance('body', '!= 0') describe HTML_TAG_BALANCE_BODY HTML has unbalanced "body" tags body HTML_TAG_BALANCE_HEAD eval:html_tag_balance('head', '!= 0') describe HTML_TAG_BALANCE_HEAD HTML has unbalanced "head" tags body HTML_TAG_EXIST_BGSOUND eval:html_tag_exists('bgsound') describe HTML_TAG_EXIST_BGSOUND HTML has "bgsound" tag # percentage of tags that are not legal elements in HTML body HTML_BADTAG_40_50 eval:html_range('bad_tag_ratio','0.40','0.50') body HTML_BADTAG_50_60 eval:html_range('bad_tag_ratio','0.50','0.60') body HTML_BADTAG_60_70 eval:html_range('bad_tag_ratio','0.60','0.70') body HTML_BADTAG_90_100 eval:html_range('bad_tag_ratio','0.90','1.00') describe HTML_BADTAG_40_50 HTML message is 40% to 50% bad tags describe HTML_BADTAG_50_60 HTML message is 50% to 60% bad tags describe HTML_BADTAG_60_70 HTML message is 60% to 70% bad tags describe HTML_BADTAG_90_100 HTML message is 90% to 100% bad tags # percentage of unique non-elements in HTML body HTML_NONELEMENT_30_40 eval:html_range('non_element_ratio','0.30','0.40') body HTML_NONELEMENT_40_50 eval:html_range('non_element_ratio','0.40','0.50') body HTML_NONELEMENT_60_70 eval:html_range('non_element_ratio','0.60','0.70') body HTML_NONELEMENT_80_90 eval:html_range('non_element_ratio','0.80','0.90') describe HTML_NONELEMENT_30_40 30% to 40% of HTML elements are non-standard describe HTML_NONELEMENT_40_50 40% to 50% of HTML elements are non-standard describe HTML_NONELEMENT_60_70 60% to 70% of HTML elements are non-standard describe HTML_NONELEMENT_80_90 80% to 90% of HTML elements are non-standard # short HTML messages with certain attributes body __HTML_LINK_IMAGE eval:html_text_match('anchor', '<img>') body __HTML_LENGTH_0000_1024 eval:html_range('length', '0', '1024') body __HTML_LENGTH_1024_1536 eval:html_range('length', '1024', '1536') body __HTML_LENGTH_1536_2048 eval:html_range('length', '1536', '2048') body __HTML_LENGTH_512 eval:html_eval('length', '< 512') body __COMMENT_EXISTS eval:html_text_match('comment', '<!.?>') body __HTML_LENGTH_384 eval:html_eval('length', '< 384') body __TAG_EXISTS_CENTER eval:html_tag_exists('center') body __HTML_TITLE_120 eval:html_text_match('title', '.{120}') body __HTML_TITLE_SUBJ_DIFF eval:html_title_subject_ratio('3.5') body __HTML_CHARSET_FARAWAY eval:html_charset_faraway() body HTML_IFRAME_SRC eval:check_iframe_src() describe HTML_IFRAME_SRC Message has HTML IFRAME tag with SRC URI else meta __COMMENT_EXISTS 0 meta __TAG_EXISTS_CENTER 0 endif ########################################################################### ifplugin Mail::SpamAssassin::Plugin::MIMEEval # __MIME_ATTACHMENT also used in 20_meta_tests.cf body __MIME_ATTACHMENT eval:check_for_mime('mime_attachment') priority __MIME_ATTACHMENT -2000 # Bug 8078 endif

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