We are using zimbra 3.1.3 GA_474.FC4 FOSS Edition for last 3 years without any major problem. Internal users are are connected through thunderbird client (IMAP). Recently we are facing the following problems:
1. All mails starts to stuckup in deffered though all serverces are running a particular time. We have to restart zimbra once a day
2. Many times a day, users faces problem to access folder through the client (Erros show: connection timed out). While sending message, message generally deliverd, but it takes long time to copy in sent folder. Disk i/o seems to okay.
Any help will be highly appreciated