Hello all,

I am currently receiving e-mails with incorrect Mime_base64 encoding.
Spamassassin adds the MIME_BASE64_ILLEGAL tag and if I cat the mailbox
part of the mime looks like this (only showing the last part of the
mail):

Qa6y+0PJZh4KsJU2CmwBOgpqIZgKgwFICoAZNQqAGT4Kp
gU4CnQJmwoBAjUKcA
lQCrBVRgqDAUUK
pgFECoctSRB+gPQPLD24RZ70iQ9QVbYQs7JJRQPtig9inXYPAvKNRHiY50QFk
zjMRbYBRCJqN0VC
Gs0QbBJVpXmlyBBTzDIPPlcXD/TM/hBQpaep/rzeD/TK0g8SAQMPP/ZVDzjYiccpxW
LH3WIEP75h
shB2J0c
PPQ24EH4JmA/ksSUQc8OmgVFmkERZslkQU8PuD3vRDBCbJJcQU8gfD/RTGw/0yIgQHLBy
EGUheA/0S8gQdiarD8wUig/0xTLRkLXC0KImZMw8NnjP9oxo2Ew+QkJSwgbRgGL20Oqg/Q/kq+wP
riOBEIEdHA8XixAQZiPDmBCFN0Q6TX0PzBSBEEULkqYbJ86BzFnghr38tUEYv+NEy7y5wKj+Bw9Q
eWwKFQ1AD107IM/X3bhDc3YFqo
wjfURpLneYECt5GHDNMkRe1ujHWpBVlalli0UhD7imTemlgMFd
xUGUfb8EEePJRUytU0OtI3FDJpO50OPzJMJwNRup/trJqf4Zjqn+OVAKDAYswKgAAQ==

--Boundary-00=_LI6/AsRuKRMJPIk--



This is not what I normally see, all lines in other e-mails have the same
length, these are different lengths.

I am using pine, a collegue of mine is using kmail and we are able to save
the attachement. The attachement is the Worm.Mydoom.I virus. If I do a
clamscan on the saved attachement it finds the virus. If I do a clamscan
--mbox on the mbox file it does not find it. I assume this is because of
the broken Mime-encoding. Is there something I have overseen that can
stop  this kind of virus e-mail? I could not find anything on the list or
in the manpages. I have not tested what outlook does with this illegal
Mime-encoding, but it wouldn't surprise me if it is also able to decode
the attachement.

I am using the stable 0.74 release (just updated my configuration to make
sure it was recent), combined with clamav-milter 0.74a. It is running on a
Solaris 8 server. Database is recent and it is detecting other viruses.
There are no errors in the log file.

Thanks for any help or pointers,

Marc Berenschot.

-- 

Marc Berenschot                         Email: [EMAIL PROTECTED]
UNIX Systeembeheerder                   Phone: 053 4894615



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