Zimbra Forums

Of course it is best to get Zimbra to take care of the problem. My solution is for those who can't wait for Zimbra. Zimbra may solve the upgrade issue by creating binaries linked to self-contained library instead of against system library or static (at least for a intermediate version for release up...

The following work around is tested many times to confirm working to solve the problem. You need to follow the instruction very carefully. This process is done with Zimbra 8.7.1 running on Ubuntu 14.04.5 LTS upgrade to Ubuntu 16.04.1. If you are running the older version of Zimbra, it is important t...

IZRUNAS, I HOPE YOU GOT YOUR PROBLEM SOLVED. I AM WRITING IN CASE YOU HAVEN'T, AND FOR THE PUBLIC BENEFIT. ZIMBRA 8 INTRODUCED A NEW FEATURE TO THROTTLE POP3 AND IMAP4 AND IT CAN CAUSE PROBLEM TO THE USERS WHO CHECK THEIR EMAIL VERY FREQUENTLY. THE POP3 CONNECTION CAN BE REJECTED BY THE SERVER AND T...

Found the answer.
It is a new feature in Zimbra 8.0. It is in the release note for 8.0 but the installer contains release note for 7.2 beta, so it was missed.

Zimbra Open Source Edition 8.0 is installed on Ubuntu 12.04 LTS @ ESXi. Everything works fine, but a heavy user gets "connection interrupted by the server" error on the Outlook. The mailboxd.log shows the following entry. 2012-10-18 10:53:37,828 WARN [Pop3Server-213] [ip=192.168.100.154;] ...