I am setting up Postfix + Devecot with my own domain example-mail.com.
I need to forward all the incoming emails which email addresses are not existing in the server to firstname.lastname@example.org. So I added the lines below to /etc/postfix/main.cf, and restarted Postfix.
# unknown_local_recipient_reject_code = 550 luser_relay = email@example.com local_recipient_maps =_
However, when I send a test emails to a random email address such as firstname.lastname@example.org, I am still getting the auto-reply message:
This is the mail system at host example-mail.com. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to postmaster. If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <email@example.com>: user unknown
And this message is also not being forwarded to firstname.lastname@example.org.
Does any one know what may be causing the issue on this? And how I can fix this?