Any particular features? Just basic Messenger operation just requires outgoing ports 1863
and 443 or 80 and 443. All TCP naturally.
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Jonathan Kay
Microsoft MVP - Windows Live Messenger
MSN Messenger/Windows Messenger
MessengerGeek Blog: http://www.messengergeek.com
Messenger Resources: http://messenger.jonathankay.com
(c) 2008 Jonathan Kay - If redistributing, you must include this signature or citation