golden hour

/var/lib/spamassassin/3.004006/updates_spamassassin_org

File/Folder	Size	Actions
10_default_prefs.cf	8.56 KB
10_hasbase.cf	2.39 KB
20_advance_fee.cf	7.43 KB
20_aux_tlds.cf	44.85 KB
20_body_tests.cf	7.01 KB
20_compensate.cf	1.89 KB
20_dnsbl_tests.cf	10.3 KB
20_drugs.cf	15.16 KB
20_dynrdns.cf	11.15 KB
20_fake_helo_tests.cf	9.42 KB
20_freemail.cf	2.99 KB
20_freemail_domains.cf	40.53 KB
20_freemail_mailcom_domains.cf	4.32 KB
20_head_tests.cf	26.83 KB
20_html_tests.cf	10.79 KB
20_imageinfo.cf	5.18 KB
20_mailspike.cf	2.86 KB
20_meta_tests.cf	3.42 KB
20_net_tests.cf	1.84 KB
20_pdfinfo.cf	15.53 KB
20_phrases.cf	7.96 KB
20_porn.cf	2.01 KB
20_ratware.cf	16.48 KB
20_uri_tests.cf	5.9 KB
20_vbounce.cf	20.28 KB
23_bayes.cf	2.94 KB
25_accessdb.cf	1.51 KB
25_antivirus.cf	1.5 KB
25_arc.cf	1.76 KB
25_asn.cf	1.93 KB
25_dcc.cf	2.89 KB
25_dkim.cf	5.12 KB
25_dmarc.cf	2.46 KB
25_dnswl.cf	2.99 KB
25_pyzor.cf	1.49 KB
25_razor2.cf	3.09 KB
25_replace.cf	25.66 KB
25_spf.cf	4.3 KB
25_textcat.cf	1.73 KB
25_uribl.cf	19.53 KB
25_url_redirectors.cf	6.33 KB
25_url_shortener.cf	11.28 KB
30_text_de.cf	25.69 KB
30_text_fr.cf	19.34 KB
30_text_it.cf	1.82 KB
30_text_nl.cf	20.15 KB
30_text_pl.cf	16.85 KB
30_text_pt_br.cf	41.93 KB
50_scores.cf	37.27 KB
60_adsp_override_dkim.cf	9.12 KB
60_awl.cf	1.48 KB
60_bayes_stopwords.cf	14.73 KB
60_shortcircuit.cf	2.36 KB
60_txrep.cf	1.31 KB
60_welcomelist.cf	11.34 KB
60_welcomelist_auth.cf	74.76 KB
60_welcomelist_dkim.cf	10.83 KB
60_welcomelist_spf.cf	6.1 KB
60_welcomelist_subject.cf	3.82 KB
72_active.cf	523.43 KB
72_scores.cf	31.17 KB
73_sandbox_manual_scores.cf	4.26 KB
MIRRORED.BY	1.05 KB
STATISTICS-set0-72_scores.cf.txt	1.46 KB
STATISTICS-set1-72_scores.cf.txt	1.46 KB
STATISTICS-set2-72_scores.cf.txt	0 B
STATISTICS-set3-72_scores.cf.txt	0 B
languages	130.47 KB
local.cf	3.14 KB
regression_tests.cf	2.71 KB
sa-update-pubkey.txt	4.67 KB
user_prefs.template	1.87 KB

Edit: 20_imageinfo.cf

# SpamAssassin rules file: Image information 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>
#
###########################################################################

ifplugin Mail::SpamAssassin::Plugin::ImageInfo

## # you can match by image name
## body		DC_IMAGE001_GIF		eval:image_named('image001.gif')
## describe	DC_IMAGE001_GIF		Contains image named image001.gif

## # you can do exact image size matches
## body	 	DC_GIF_264_127  	eval:image_size_exact('gif','264','127')
## describe 	DC_GIF_264_127  	Found 264x127 pixel gif, possible pillz

# you can do image to text, or image to html ratios
rawbody		__DC_IMG_HTML_RATIO	eval:image_to_text_ratio('all', '0.000', '0.015')
describe	__DC_IMG_HTML_RATIO	Low rawbody to pixel area ratio

body		__DC_IMG_TEXT_RATIO	eval:image_to_text_ratio('all', '0.000', '0.008')
describe	__DC_IMG_TEXT_RATIO	Low body to pixel area ratio

# body		DC_GIF_TEXT_RATIO	eval:image_to_text_ratio('gif',0.000, 0.008)
# describe	DC_GIF_TEXT_RATIO	Low body to GIF pixel area ratio

# rawbody	DC_GIF_HTML_RATIO	eval:image_to_text_ratio('gif',0.000, 0.008)
# describe	DC_GIF_HTML_RATIO	Low rawbody to GIF pixel area ratio

# using exact size match to identify things like screenshots
# body	 	__SCREEN_640x480  	eval:image_size_exact('all',800,600)
# body	 	__SCREEN_800x600 	eval:image_size_exact('all',800,600)
# body	 	__SCREEN_1024x768 	eval:image_size_exact('all',1024,768)
# body	 	__SCREEN_1280x1024  	eval:image_size_exact('all',1280,1024)
# meta		DC_SCREENSHOT_JPG	( __SCREEN_640x480 || __SCREEN_800x600 || __SCREEN_1024x768 || __SCREEN_1280x1024 )
# describe	DC_SCREENSHOT_JPG	Contains image matching common screen resolution
# score		DC_SCREENSHOT_JPG	-0.01

# you can do minimum demension matches
# body	 	DC_GIF_300		eval:image_size_range('gif',300,300)
# describe	DC_GIF_300		Contains a 300x300 pixels gif or larger
# score		DC_GIF_300		0.01

# you can do ranged demension matches
# body	 	DC_JPEG_200_300		eval:image_size_range('gif', 200, 300, 250, 350)
# describe	DC_JPEG_200_300		Contains jpeg 200-250 (high) x 300-350 (wide)
# score		DC_JPEG_200_300 	0.01

# you can count the number of images (all or by image type)
body	 	__GIF_ATTACH_1		eval:image_count('gif','1','1')
body  		__GIF_ATTACH_2P		eval:image_count('gif','2')

body		__PNG_ATTACH_1		eval:image_count('png','1','1')
body  	 	__PNG_ATTACH_2P		eval:image_count('png','2')

body		__JPEG_ATTACH_1		eval:image_count('jpeg',1,1)
body		__JPEG_ATTACH_2P	eval:image_count('jpeg',2)

# you can determine pixel coverage (all or by image type)
body		__GIF_AREA_180K		eval:pixel_coverage('gif','180000','475000')
body		__PNG_AREA_180K		eval:pixel_coverage('png','180000','475000')
# body		__JPEG_AREA_180K	eval:pixel_coverage('jpeg',180000,475000)

# meta together something useful
meta	 	DC_GIF_UNO_LARGO	( __GIF_ATTACH_1 && __GIF_AREA_180K )
describe 	DC_GIF_UNO_LARGO  	Message contains a single large gif image

meta		__DC_GIF_MULTI_LARGO 	( __GIF_ATTACH_2P && __GIF_AREA_180K )
describe	__DC_GIF_MULTI_LARGO  	Message has 2+ inline gif covering lots of area

meta	 	DC_PNG_UNO_LARGO	( __PNG_ATTACH_1 && __PNG_AREA_180K )
describe 	DC_PNG_UNO_LARGO	Message contains a single large png image

meta	 	__DC_PNG_MULTI_LARGO 	( __PNG_ATTACH_2P && __PNG_AREA_180K )
describe	__DC_PNG_MULTI_LARGO  	Message has 2+ png images covering lots of area

# meta	 	DC_JPEG_UNO_LARGO 	( __JPEG_ATTACH_1 && __JPEG_AREA_180K )
# describe	DC_JPEG_UNO_LARGO  	Message hash single large jpeg image

# meta	 	DC_JPEG_MULTI_LARGO 	( __JPEG_ATTACH_2P && __JPEG_AREA_180K )
# describe	DC_JPEG_MULTI_LARGO  	Message has 2+ jpeg images covering lots of area

meta		DC_IMAGE_SPAM_TEXT		( !__HAS_URI && __DC_IMG_TEXT_RATIO && ( DC_GIF_UNO_LARGO || DC_PNG_UNO_LARGO || __DC_GIF_MULTI_LARGO || __DC_PNG_MULTI_LARGO ))
describe	DC_IMAGE_SPAM_TEXT		Possible Image-only spam with little text

# meta the stock rules together for HTML_IMAGE_ONLY_*
meta		__HTML_IMG_ONLY			( HTML_IMAGE_ONLY_04 || HTML_IMAGE_ONLY_08 || HTML_IMAGE_ONLY_12 || HTML_IMAGE_ONLY_16 || HTML_IMAGE_ONLY_20 || HTML_IMAGE_ONLY_24 || HTML_IMAGE_ONLY_28 )

meta		DC_IMAGE_SPAM_HTML		(!__HAS_URI && ( __HTML_IMG_ONLY  || __DC_IMG_HTML_RATIO ) && ( DC_GIF_UNO_LARGO || DC_PNG_UNO_LARGO || __DC_GIF_MULTI_LARGO || __DC_PNG_MULTI_LARGO ))
describe	DC_IMAGE_SPAM_HTML		Possible Image-only spam

endif