>I'm running a few lists that have been getting hit with viruses, so I've
>decided to ban all mail with attachments from my lists. IMHO, people
>shouldn't send attachments to lists anyway.
>
>What I've done is make a rule for the list to look for multipart/mixed in
>the header, and if found, delete it. Will this catch all attachments?
>Anyone see problems with this?
No, it will not catch all E-mails with attachments. I've actually got a
copy of the new Bugbear virus in front of me, and it doesn't contain
"multipart/mixed" in it.
For example, that won't catch "just attachments" (E-mails that have no text
or HTML segment, that just consist of a single MIME segment that is the
attachment).
MIME is pretty complex -- you may want to check out RFC1521 to see how it
works.
-Scott
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