Sending mail via PHP gives fatal error in postfix

smares asked:

Any idea why sending mail via PHPs mail() function gives the following error in postfix:

fatal: no login name found for user ID 6000.

6000 in this case is the user I have configured in the PHP-FPM pool and it’s not an existing Linux user account.

My answer:


You didn’t create a user with the uid 6000. Once you do that, postfix will begin servicing the user.


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