I have a district using both GMail and Smartermail for their users.
I have it set so that all inbound messages go to Smartermail, then each Smartermail account forwards the message to the GMail address [email protected] which works without a problem. In GMail I found the route settings so that all sent mail gets redirected back to Smartermail. The problem I am having is that I can specify a domain name, and port, but my Smartermail only accepts inbound mail on port 587 and the user has to be authenticated to relay mail. Can I use something like username: [email protected]:587 to pass the authentication?
