spamassassin plugin to check image attachments
This Spamassassin plugin checks for specific keywords in image/gif,
image/jpeg or image/png attachments, using gocr (an optical character
recognition program).
This plugin can be used to detect spam that puts all the real spam
content in an attached image, while the mail itself is only random
text and random html, without any URL's or identifiable information.
Additionally to the normal OcrPlugin, it can do approximate matches on
words, so errors in recognition or attempts to obfuscate the text
inside the image will not cause the detection to fail. Another
improvement was to move the wordlist into the configuration file so it
can be easily extended.
