[SOLVED] Message Queue getting stuck
Over the past 2 days, I have been seeing a problem that the Deferred mail queue starts filling up and no new mail is delivered locally.
A restart of Zimbra solves the problem, and the queue empties out immediately upon the restart (zmcontrol stop, zmcontrol start)
In the log files (zimbra.log) I see the following (with names changed to protect the innocent, of course):
>Jul 9 10:43:43 XXXXXX postfix/qmgr: 242AD90BE2D: to=<email@example.com>, relay=none, delay=0.03, delays=0.01/0.02/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: conversation with mail.xxx.xxx.xxx[nnn.nnn.nnn.nnn] timed out while receiving the initial server greeting
Not sure where to look for the problem. Can anyone point me to what I should be looking for? I don't think its a network problem, because as I said, a zimbra restart fixes the problem. And it only started happening over the past two days.
Has anyone run into this before?
Thanks for any help,
International Research Institute for Climate and Society
Earth Institute at Columbia University
Release 7.2.7_GA_2942.RHEL5_64_20140314190109 RHEL5_64 NETWORK edition.