I've set up Courier 0.42.2 on RedHat 9. Everything is set up and working, except when trying to use Outlook to send mail via SMTP. I receive relaying denied errors from one of my users. He is on a DSL connection without a static IP, so adding to smtpaccess doesn't seem to be a solution.

I've read several articles about authenticated SMTP getting around relay domains. Can anyone point me to a good article/FAQ on how this works and how to set it up? I'm currently authenticating with the userdb file (authuserdb). However, I've installed the whole gamut when I built courier.

Thanks in advance!