From: Will Simpson (witstratfor.com)
Date: Sat Mar 01 2003 - 11:30:21 CST

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I too am having some relaying issues.

I get a few of these messages from both my corporate mail server and my list
server.

croftergte.net>: host dca1-mx.mail.algx.net[204.91.241.16] said: 550 5.7.1
    <croftergte.net>... Relaying denied. IP name lookup failed
[xxx.x.xx.xxx]
    (in reply to RCPT TO command)

<ekleinusb.ve>: host dca1-mx.mail.algx.net[204.91.241.15] said: 550 5.7.1
    <ekleinusb.ve>... Relaying denied. IP name lookup failed [xxx.x.xx.xxx]
    (in reply to RCPT TO command)

The "IP lookup failed" IP is my firewalls IP `[xxx.x.xx.xxx]` and the
dca1-mx.mail.algx.net[204.91.241.16] IP is my back-up mail server (we were
off line a bit this morning. But I get them from all over. I even get them
from a form based e-mail that is being submitted by our external web server

What do I need to do to fix this?

I have twewaked the main.cf and I do have a relay-domains file that the
relay_host points to. Do I need to put the IP of my firewall in this file?

I am a little lost here.

Thanks,

Will Simpson

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