From: Magnus Bäck (magnusdsek.lth.se)
Date: Wed Oct 01 2003 - 18:55:49 CDT

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On Wed, Oct 01, 2003 at 04:46:55PM -0700,
     Jason Williams <jwilliamscourtesymortgage.com> wrote:

> I have a question regarding open relays. I know what they are and why
> they are very important.

Yes, their non-existance is very important :-)

> But what I wanted to know is, what measures can I take on my end to
> ensure that my postfix Mail Gateway is not an open relay?

Don't screw up the configuration. More seriously, make sure you
understand the way Postfix' restrictions work. Postfix is safe with
the default configuration, so don't fiddle around without a reason.

> I've reading over the documentation on the postfix.org web site right
> now, but I was hoping to get some insight on some extra added layers
> of security I could use to ensure that my server is configured
> correctly and is not an open relay.

Post "postconf -n" to the list and we can take a look. Even if it isn't
an open relay, you can probably get some good feedback and learn a thing
or two.

--
Magnus Bäck
magnusdsek.lth.se

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