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postfix problem - hostname same as external email-account (via

July 8, 2015 2.4k views
Email LEMP Nginx WordPress Ubuntu

I'm running postfix on LEMP Ubunto 14.04
My webserver hostname "" is sending emails fine internally & externally but not when I try to send it to my external email server ( that is configured to send emails under my hostname. So my email-server ( can send emails as "".

When I send an email or notification from my webserver (or wordpress) to """ it throws an error "user unknown" (since it's not a system user). I tried aliases (incl. root forwarding) but those also never get delivered to my external mail server.

So actually I receive no system email at all at my external email server. What to do?

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