> Also, if a user sends a local email - does it pass through the > router or does it just stay locally on the network (the mail server > and workstations are all behind the same router/gateway)?
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. --Sandy ------------------------------------ Sanford Whiteman, Chief Technologist Broadleaf Systems, a division of Cypress Integrated Systems, Inc. e-mail: [EMAIL PROTECTED] SpamAssassin plugs into Declude! http://www.mailmage.com/products/software/freeutils/SPAMC32/download/release/ Defuse Dictionary Attacks: Turn Exchange Addresses into IMail Aliases! http://www.mailmage.com/products/software/freeutils/exchange2aliases/download/release/ 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/
