Hi guys, I just setup SMTP connector on my BE clustered Exch2003 servers to route all email for entire organization to my FE server. "Why would you do that?" some may ask since in BE and FE Excange topology you don't need the SMTP connector. Here is why: 1. I use to have BE and FE all running on win2003 with Exch2003 enterprise servers. My BE is clustered and FE hosted Microsoft IMF and OWA. Since IMF didn't do a very good job for our company, we looked into commersial software for Spam. 2. I am running a trial of ModusGate by Vircom. Since Spam software come with it's own SMTP setup, i disable all the SMTP and Exchange services on my FE server, but left OWA hostimng running. I also left the settings on the FE server checked for "this is a FE server" so the OWA will function correctly. So far everything worked good. I was catching tons of spam emails and blocking it. By later i discovered that i cannot filter anything leaving our domain, information moves freely out of the mail server. I had a feeling BE server no longer used FE server to send mail through. That is why i setup SMTP connector on my BE clusters to old FE server that runs Spam software. So far it hasn't been working, i don't think BE is using this connector to send mail through FE. Do any of you know if there limitations in 2003 Exchange? I had same setup in Exch5.5 and it worked fine, because i filtered all kinds of stuff. Thanks, Vadim.