I'm a new member to this forum, so please let me introduce myself. I'm currently working as a network staff and implementing Zimbra Collaboration Suite as an email server in my office.
Recently, Zimbra sometimes stop responding as if it hangs and can't be telnet from the client. FYI, i'm using telnet to detect whether my email server is working or not. And some of our users are reporting that they can't send/receive messages. But later, the Zimbra is working normally...
I myself has also found that when Zimbra is not working, I have to restart the network service on the server (I'm using CentOS 5.1). Have anyone experience the same problem as I did? Please let me know how to fix this problem... Thank you very much.