[NTLUG:Discuss] mail server ... general question ...

[Jack Snodgrass]

procmail will probably do this. You call procmail as your local mail
delivery agent.
It can scan the message for the rules you set up and choose to deliver the
message
or not.

jack

----- Original Message -----
From: "Fred James" <fredjame at concentric.net>
To: <discuss at ntlug.org>
Sent: Monday, February 25, 2002 1:25 PM
Subject: [NTLUG:Discuss] mail server ... general question ...


> (general question because I don't know enough specifics yet)
>
> The question is dropping incoming mail that does not have at least one
> recipient listed who's domain matches one in a list of domains.
>
> The assumption is that the mail server software lacks any feature that
> would provide this capability.
>
> The only two approaches I have been able to think of:
> (1) Server receives mail and calls a program/script to validate the
> domain, waiting for a drop/pass return value.
>      (a) Seems an unlikely approach without extensive modifications to
> the mail server software.
> (2) Filter the incoming data stream, before it reaches the mail server
> software, dropping all invalid messages.
>
> Does that sound right so far?
>
> Actually, what we seem to be dealing with is a denial of service attack
> followed by, or couple with, the remailing of spam.
>
> Sorry I cannot be more specific just yet - that's all the details I have
> so far - do they sound right, do you think?
>
> Thanks in advance to anyone who would care to share any insight(s) on
> this kind of thing.
>
>
> --
> ...make every program a filter...
>
>
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