SRV Records for Autoconfiguring Email Clients?

Supporting email is a PITA with users and there must be a better way. When you set up Outlook to connent to interworx, one of the things it does is check for "Settings" for your domain. I believe it does this with SRV records. I attempted to put records in for my domain, but it does not auto-configure. However, the behavior did change a little, so I think I got a little closer.

Anyone know how to set up the auto configure settings to work with Interworx? Thanks!