loops back to myself

[stevegarriques]

behind a firewall but no don't have a SPLIT-DNS setup / never done it before

But, We do have a internal DNS server that the zimbra server resolves to, I really don't want to setup ANOTHER DNS server. What other way can I do this? Would this resolve the issue? :

Setting up the internal domain as primary and then setting up a Virtual Domain using the External domain and having everyone use that as their primary on their email accounts?

[stevegarriques]

Anyone have any ideas about this?

[kcearns]

Came across this thread and another earlier today when I had a similar problem with an install. Turns out it had nothing to do with the server itself. A firewall performing NAT and port forwarding had hijacked outbound port 25 traffic and was redirecting it back to the mail server. Port forward fixed, mail loop errors went away. Probably not pertinent to this particular problem but I thought I'd mention it.

[stevegarriques]

Interesting, so you fixed it with port forwarding?

Originally Posted by kcearns

Came across this thread and another earlier today when I had a similar problem with an install. Turns out it had nothing to do with the server itself. A firewall performing NAT and port forwarding had hijacked outbound port 25 traffic and was redirecting it back to the mail server. Port forward fixed, mail loop errors went away. Probably not pertinent to this particular problem but I thought I'd mention it.

[kcearns]

The port forwarding was causing the problem. They had an edge device forwarding inbound 25 traffic to the mail server. For some reason, maybe a faulty device or improperly setup forward, outbound 25 traffic was being redirected back to the server. Inbound mail worked fine, outbound did not.

[stevegarriques]

Wierd. See our Outbound and Inbound works fine. I still get that Error every day or every other day. I spent a long time with a Zimbra Employee tryin to figure out what was going on and he just came to the conclusion to not worry about it and everything was setup correctly.

How has your installation been? Everything running smoothly>

[kcearns]

Other than the odd looping yesterday (now thankfully fixed) it's been all good