I have a strange error.
I have used Zimbra Desktop on my RHEL 5 maschien, and its working great.
However, it does not work on Fedora 9.
I can install it and start it, but when I try to configure an account, it fails to connect.

Connection failed. Please verify your server and port settings.

This happends regarless if I use IMAP, POP3 or Zimbra accounts.
Any ideas what that could be?