securing relay...

Peter Bonivart peter at UCGBOOK.COM
Mon Oct 3 23:30:16 IST 2005

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JD Doelitzsch wrote:
> Im not sure if this has to do with MailScanner or not, because its just
> totally beyond me, maybe you can shed some light or point me in the right
> direction. The setup is MailScanner pushes to exchange via
> Mailertable/sendmail. Access only has in it. When I telnet to
> the MS box relay-denied(good) when trying to send other than as
> far as i can tell, But when monitoring packets I see spam originating or
> relaying from my MS server to the net. It's getting me blacklisted. What
> kind of command lets people relay? thats the one thing i can't verify when
> looking through the packets. I would like the MSbox only to relay to my
> exchange server and nowhere else. The only thing i can think or is to put a
> firewall on the MS box to only allow outgoing to my exchange box. What would
> be the forseeable results of that? is there a better way?

You can test for open relays here:

/Peter Bonivart

--Unix lovers do it in the Sun

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