I'm facing one issue with one of my e-mail domain unable to receive external e-mail. Can anyone please help me?
I have been running Ubuntu server 8.04 with licensed Virtualmin for several months now.
I have 4 domains running and recently one of the domain is unable to receive external e-mail.
The rest of the domain is running fine.
It happened 2 days ago out of a sudden.
This is what I have in the mail.log,
Nov 5 09:16:25 ns1 postfix/smtpd: NOQUEUE: reject: RCPT from blu0-omc2-s35.blu0.hotmail.com[22.214.171.124]: 554 5.7.1 firstname.lastname@example.org: Relay access denied; email@example.com firstname.lastname@example.org proto=ESMTP helo=<blu0-omc2-s35.blu0.hotmail.com>