I've been running Zimbra for the past 9 months on my local network. I have it installed on a 1Ghz 512Mb ram Fedora Core 3 box which runs nothing else (a pretty low specc'd box but I'm the only user).
Quite often, when browsing my email via Thunderbird, I'll have the server timeout on me. Other times it'll take ~20 seconds to respond. 9 times out of 10 I'm looking for new messages in a folder that has thousands of messages in it.
If I browse the folder via the web client though it seems to respond in a timely fashion. I've yet to see it take more than 5 seconds, let alone timeout.
Any suggestions as to what I can do?