Assuming you're using BIS, it will walk you through the set up. It may be helpful if you can see how the email client used to access the server does so, so you can get server names, ports, and account used.
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957 => 5820 => 7280 => 7290 (UL) => 8820 (UL) => 9000 (UL/DB) => 9800
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