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A customer called this morning with a problem. He'd upgraded his Kerio® Connect mail server so that they could use Instant Messaging and said he'd run into a problem. When I asked what that problem was, he said that it actually had to do with their Kerio Control Firewall.
Kerio® Connect mail server recently added Instant Messaging support. When I first heard that, I thought it was absolutely rediculous! If you want IM, open up the ports in your firewall and let it go.. why on earth do you need the mail server involved? I'm not generally a big fan of IM anyway, so I just dismissed this idea entirely.