postfix error : transport unavailable after upgrade to 7.2.3 on Centos 6.4
I upgraded my box from Zimbra 7.2.2 on Centos 6.4 to Zimbra 7.2.3 ..but after upgrade emails can't be sent within the local domain or to external domain..it was working fine on 7.2.2..any help is much appreciated...browsed the forum but can't find the right solution..everything is running when I checked the status..
[zimbra@webmail ~]$ zmcontrol status
ar 20 17:23:00 webmail postfix/error: 7CA203941671: to=<firstname.lastname@example.org>, relay=none, delay=0.19, delays=0.08/0/0/0.11, dsn=4.3.0, status=deferred (mail transport unavailable)
I did the same upgrade for the other box and it is running fine...I dont know where to look for anymore..pls help..