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Zimbra 7.1.2 and the MTA seems to be deferring e-mail when it is received.

Oct  1 09:35:42 www postfix/error[16614]: 5FB8C1A803EE: to=<xxx@xxx.xx>,
relay=none, delay=0.15, delays=0.08/0.01/0/0.06, dsn=4.4.1, status=deferred (delivery 
temporarily suspended: connect to[]:7025: Connection
timed out)

I can telnet to both 25 and 7025.

I do get a

$ telnet 25
Connected to
Escape character is '^]'.
220 ESMTP Postfix

500 5.5.2 Error: bad syntax

500 5.5.2 Error: bad syntax`

I dont see email in the inbox obviously and I am not sure how to troubleshoot what is going on.

Nothing DNS has changed.

This box has been running for a year

Zimbra was removed and re-installed after trying to upgrade to ZCS-8 with no luck.

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1 Answer 1

try disabling DNS lookups on global MTA setting and server MTA setting. also check this article out. worked for me I'm also on 7.2.1

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