http://bugzilla.spamassassin.org/show_bug.cgi?id=3069





------- Additional Comments From [EMAIL PROTECTED]  2004-04-14 13:50 -------
Subject: Re:  non-text part inside of forwarded message included in "body" 

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>If we don't scan message/rfc822 parts, then that's exactly what spammers
>will start sending (and this is a similar problem to one of the major
>flaws with challege/response systems, spammers can fake C/R messages and
>trick users into opening them).

I think I'd settle for making this behaviour optional, through a boolean
config parameter.  I will definitely be turning it off ;)

Consider also the effects on Bayes learning -- if a mailman admin
(or someone similarly receiving nonspam mails with spammy messages
encapsulated within them) wants the nonspam mails to get past Bayes,
they'll probably consider learning them as ham.  That'll wind up
with a load of spam tokens (from the encapsulated spam) getting learned
as ham.

>Haven't we always scanned message/rfc822 parts anyway?  Maybe not very
>effectively or consistently, but I thought we just muddled through them
>in 2.6x.  Maybe I should re-read the old thread... :-)

Possibly it's the new MIME-part comparison rules that are causing trouble
here: MIME_HTML_MOSTLY, MPART_ALT_DIFF.  Also the HTML rules are now
firing on the message/rfc822 text, whereas before I think the
message/rfc822 part would be treated as plain text, and its HTML
sub-parts would not be parsed as HTML correctly.

- --j.
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