Hi All, I'm new to Exchange 2007 and I am trying to configure the system to send all outbound messages using my external SMTP server hosted by a shared web hosting provider. I looked into send connectors but I'm not sure if my SMTP server, mail.kirkouimet.com, qualifies as a smart host. Is it possible to have Exchange send all messages using my external, third party, SMTP server? Mail flow would ideally go like this: Exchange > mail.kirkouimet.com > External Destination E-mail Address Any help in this would be much appreciated. Thanks!

Hi Kirk, The short answer is yes that is possible. Basically a smart host is a SMTP server that knows where mail should go (sometimes better than the internet). So as long as your smart host (mail.kirkouimet.com) knows where all the mail goes with either hardcoded entries or the use of an external DNS source then you will be good to go... http://en.wikipedia.org/wiki/Smart_host(very brief article but it is a good overview) -matt

Thanks for the reply Matt. I added mail.kirkouimet.com as a new connector. For kicks I tried no authentication and sent a test message and I actually got a message back from Exchange! It says: Diagnostic information for administrators: Generating server: home.local madmax.dreamhost.com #554 Service unavailable; Client host [myIP] blocked using zen.dnsbl; http://www.spamhaus.org/query/bl?ip=myIP ## So it looks like I'm getting filtered by DreamHost's (my hosting service) spam filter. When I try to use Basic Authentication with my user name and password (with or without TLS checked) I don't get any response in anyway - the message isn't delivered and Exchange doesn't respond. Is it possible to see if the messages are stuck in some kind of queue?

SOLUTION FOUND:Turns out that DreamHost does not allow message relaying through their customer's SMTP servers. I used my ISPs SMTP server and it worked fine.Thanks!