So basically we have Zimbra running in a VM on Ubuntu. Everything seems to be configured probably for the most part. The MX & A records have been setup. I am able to hit the public webmail address & login.
The issue is: we are unable to send/receive emails locally or externally. No bounceback emails are received. Under server status, next to our domain, there is a red X. All services underneath is have a red X as well. Under mail queue, all the emails are deferred. All emails say the following: Reason: host 127.0.0.1 [127.0.0.1] said: 451 4.5.0 error in processing, id=24706-06, parts_decode_ext failed: unix utility file(1) not available, but is needed at (eval 97) line 110,
line 784. (in reply to end of data command)
While researching this issue I came across this forum:
[SOLVED] Unable to receive email 4.5.6:
The second post (from a Zimbra Consultant) asked the person to double check everything: What else is in the logs? Is there any reason the connection might be refused? Are your DNS A & MX records correct? Is your hosts file correct? Is there any firewall? Are you behind a router? If so, you'll need a Split DNS setup.
So I checked out the Split DNS link: Split DNS - Zimbra :: Wiki
I configured that as well. We are completely stuck. Any help is greatly appreciated! Thank you.