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I would want to
-- check the header for "Content-Transfer-Encoding: base64"
-- if yes, then
----- decode content
----- parse HTML code for specific words in content using pregexp pattern
----- when found send message to /dev/null or to a junk mail box
You might want to edit your post to remove your email address. Spammers will harvest it.
You'll need to use an external program to decode the base64. Do you know how to run an external program in procmail?
I found several informative links with this search.
An alternative is to use spamassassin, which decodes base64 already and is probably in your distro's repositories.
On my server, I run all email through spamassassin, and mail that's not rejected goes through procmail for some further checks and sorting.
I didn’t know how to it either...there were a couple of examples in that search I posted.
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