On Mon, 14 Jan 2002, Denis HAVLIK wrote:

> Folks,
>
> Why don't we make a really simple anti-virus program, which simply rejects
> all .doc, .exe, etc attachements? I for one would love to have such a
> possibility in postfix configuration. Something like:
>
> ***********************************************************************
> Do yo want to bounce all emails with dangerous attachements(*) back to
> sender? (Y/N)
>
> (*) .exe, .doc, (give a full list here) attachements are known as
> source of computer viruses, and therefore potentially dangerous. While
> many anti-virus programs exist, which scan such attachements, the
> simplest way to make sure no viruses go trought is to deny ALL
> attachements of these types. While very efficient, this solution may make
> some of your users really mad at you, so use with care.
> *************************************************************************
>
> WDYT?

I wouldn't say that it stops *all* viruses. I figure that it is possible
to embed some information inside HTML files. But it definetly removes
almost all current virii and trojans.

But yes, I think that given that it is very simple to implement, and
consumes very little resources, it is worth giving such an option to the
sysadmin.

One thing though: Where exactly is this filtering performed in postfix?

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