I have Zimbra running perfectly and I can connect with different mail clients (both outlook and thunderbird). My client requires using Sugar CRM mail client to basically send and recieve emails, However When i added the mail server settings and tried testing the connection, it takes a while and says connection timeout. Even when i tried imap/pop over ssl it still does not work.

On the sugar crm, i tested with another mail server and that works perfectly as the test settings show it can connect to the server.
Has anyone had this kind of issue before and can they recommend something to do. I have posted this on Sugar forums as well but no reply.