RE: "In a well-designed network, packets between hosts on the same subnet do not get processed by a router. But you can accidentally break this rule: if your internal clients are using a hostname that their DNS resolves to an external IP, their traffic will indeed go to the router--but then the router steers it back to the local network via a NAT rule, and you have the very undesirable "loopback NAT" situation."
That makes sense about looking for an external IP. And I must admit that my network is not well designed (not by me!) so that is likely the case. I changed my outlook smtp and pop settings to look directly at the IP address rather than mail.domain.com. Would that prevent it from leaving the network and doing the loopback? So far my tests have been good but the problem is intermittent so it is not 100% proven yet. ~Laura To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
