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I am trying to relay email thru my provider that has a mail server for my domain (xxxx.com). My postfix is configured as follows:

relayhost = [smtp.xxxx.com]:25

the server requires authorization, but it is working correctly.

> smtp.xxxx.com[79.96.129.xxx]:25: AUTH PLAIN AewfewfewfcewfewfewfbwBLYnNKazY1UVUjZnc=
< smtp.xxxx.com[79.96.129.xxx]:25: 235 2.7.0 User mailing+xxxx_com logged in.

The problem is: the relay server REQUIRES "MAIL FROM:" to be set to the same user I use for authenticaton. But the user is by default different.

> smtp.xxxx.com[79.96.129.xxx]:25: MAIL FROM:<user@server.xxxx.com> SIZE=296
< smtp.xxxx.com[79.96.129.xxx]:25: 550 5.1.8 Sender address rejected

The question is: how to make my local postfix to user "MAIL FROM:" as a user from relaying server regardless the local user that sends the mail?

Thanks!

masegaloeh
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Pepe
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1 Answers1

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There are multiple solutions. All are described in the documentation: http://www.postfix.org/ADDRESS_REWRITING_README.html#delivering

mailq
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