Email fowarding to same domain (internally) fails. Mail Delivery System: "Unknown user"

[kylegp]

Thanks for the reply.

What’s the best way to make the change to the hostname that’ll have it permeate through the install and update properly?

Also keen to understand if there is a bug present or not here so I know where I’m at fault, and where I’m not.

[Ilia]

@Joe

And, @Ilia , unless I’m misunderstanding what’s happening here, I don’t think we should “fix” it. This is a misconfiguration, not a bug.

Well, it was the misconfiguration bug produced by VIrtualmin 7.7, which I fixed for Virtualmin 7.8 some time ago.

[Ilia]

@kylegp

What’s the best way to make the change to the hostname that’ll have it permeate through the install and update properly?

This has to be a separate topic.

[Ilia]

@Joe

Ilia’s offering reasonable suggestions for working around this problem, but it’s better to just not cause the problem: Don’t name your server the same name as a name you’ll be hosting virtual mail and websites for.

@Joe, oh, I see what you mean now. No, the issue wasn’t just caused by using domain name with the same name as the hostname. The local addressee with @ in /etc/aliases should be escaped to have mail delivered locally when resolve_dequoted_address set to no (and no extra Unix user with the dash for Postfix is created).