I have just deployed zimbra 4.5.5 on CentOS 4.5.
Seems to be working great except that emails sent to firstname.lastname@example.org are rejected (sample below) whereas emails to email@example.com are accepted.
What can I do to get mails to the domain accepted?
May 31 10:59:16 pandora postfix/smtpd: NOQUEUE: reject: RCPT from jeeves.egr.msu.edu[22.214.171.124]: 554 <firstname.lastname@example.org>: Relay access denied; from=<email@example.com> to=<firstname.lastname@example.org> proto=ESMTP helo=<egr.msu.edu>
(Tests indicate that had the above mail been sent to pandora.lsd.k12.mi.us it would have been accepted.)