Yeah, so even changing the domain name on the server (Ubuntu) itself doesn't 
fix the issue. It must be ip based. Since the proxy and Postfix share an IP 
address, Postfix will always think it's looping back to itself. Is that 
correct? 





On Thursday, May 30th, 2024 at 5:55 PM, Wietse Venema via Postfix-users 
<[email protected]> wrote:

> Mailman29 via Postfix-users:
> 
> > Have a good pub visit.
> > Changing the "myhostname" line in postfix has zero effect. It still says 
> > "loops back to myself" :(
> 
> 
> Having a problem? https://www.postfix.org/DEBUG_README.html#mail
> 
> Wietse
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