Re: [Req #1045] Virus on the muLinux mailing list

From: Joshua Hudson (
Date: Wed May 08 2002 - 19:27:42 CEST

>From: Karl-Heinz Zimmer <>
> > That is tricky. However we can enforce that the posts _has_ to to be
> > in text/plain format. This might lead to others getting
> > bitten. This will make sure that only mail with content-type:
> > text/plain will get through to the list ?
>Hi Lars,
>what about the following: Allow all messages which are either having
>top level Content-Type=text/plain or Content-Type=multipart/alternative
>while containing a text/plain part in their multipart section?
>By doing so we could receive all mails that are either just plain text
>_or_ are a combination of plain and html text - and there are _lots_
>of mails of the 2nd type.

If you want less interruption: you can try blocking the following
extensions on attachment types: .com, .exe, .bat, .scr, .dll,
.png, .jpg, .gif, .eml (That will kill most MS viruses and
many kinds of spam. More can be killed by blocking all mail
with the text <IMG or <img in context-type:text/html)

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