[Mimedefang] Help
David F. Skoll
dfs at roaringpenguin.com
Mon Apr 22 10:16:48 EDT 2002
On Mon, 22 Apr 2002, Zhang Lin-bo wrote:
> 1) Attachments whose name contains multi-byte characters
> (such as Chinesei characters[B)
> 2) Attachments whose name contains certain special chars,
> e.g.: applet[1].pif
I have verified that both of these are problems. The reason is that
the MIME is malformed. A name such as applet[1].pif should be enclosed
in quotation marks like this: "applet[1].pif". Also, multi-byte
characters should be encoded using a proper MIME encoding.
Unfortunately, it is difficult (if not impossible) to get MIMEDefang
to "correctly" interpret invalid MIME, because there's no guarantee
e-mail clients will interpret it the same way. This problem was
discussed at some length on Bugtraq:
http://online.securityfocus.com/archive/1/255910
http://online.securityfocus.com/archive/1/256616
Regards,
David.
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