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RE: [cobalt-users] Users' SMTP Server

Thanks, Dan.
As I said before, I have already implemented software of this nature. The problems I am talking about come from users that are on my system (spammers sign up with that intent). They can easily check their mail before they send spam through the account. My simple question to the list is this:
How can I prevent the IP and domain name of the main server from showing up in my users' outoging email? I want the users' IP and domain there, not my server's.
I am not concerned with relaying issues from outsiders. Plenty of spammers get free/low cost accounts to do their mischeif. If they use mine, and AOL gets em before I do, the IP and domain will be blocked. Not good.
Any way to accomplish this? (ie sendmail config, multiple smtp servers or IP masquerading perhaps?) 

Thanks agqain...
David


From: "Dan" <dan@xxxxxxxxxxxxx>
Reply-To: cobalt-users@xxxxxxxxxxxxxxx
To: <cobalt-users@xxxxxxxxxxxxxxx>
Subject: RE: [cobalt-users] Users' SMTP Server
Date: Wed, 10 May 2000 06:37:42 -0400


> I have noticed that the IP address & domain name of my main
> server shows up
> in the headers when one of my users sends out email.  I was
> wondering this:
> Is there a way to make it so their email headers shows the IP and
>  Domain of
> the user instead of my server?
> I am thinking it may involve some sendmail configuration, or
> possibly adding
> multiple smtp servers on one machine(if that is even possible). Or maybe
> port settings? I obviously do not know much Unix/Linux.
>
If you just use POP before SMTP, your machine will not be an open relay so
it won't be blocked. If you've made the mistake of allowing blanket relay
from common ISP domains like AOL, the spammers will find you anyway.
--
Dan Kriwitsky



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