I have had problems with other email servers beliving that our email was spam (because I am running an exchange server behind my hosting provider's server), so we decided recently to change to a smarthost delivery for email - so that everything is sent and received thru my host.
I am using SBS2003 server, SP1 - with Microsoft Exchange server 2003.
I have set up the delivery to smarthost rather than via DNS (and put my hosting provider's smtp server name) and have also changed the authentication for the SMTP connector to basic, with the user and password for my hosting provider.
But no email goes thru. How can I troubleshoot this problem ?