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Re: Fw: VIRUS IN YOUR MAIL (W32/BugBear.A (Clam))

On Thu, Oct 17, 2002 at 02:18:34PM +0200, Emile van Bergen wrote:
> Of course, you need to implement quite a bit of SMTP before getting at
> the DATA phase, but it's potentially cleaner than doing it in a
> transparent proxy, because you only have to deal with the pure data
> stream through a set of open file descriptors, not with the IP side
> of things.

If postfix (or whatever MTA you use) sees the connection as comming from
the proxy server, rather then the real server, you have just broken the
code which prevents postfix being used as an open relay.

The MTA needs to know where the connection started of from, in order to
decide if it is allowed to relay the mail or not.
Brian May <bam@snoopy.apana.org.au>

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