Ok, thanks. I've got it working with Outlook 2007. But I need to be able to use it with Outlook 2003. The problem is that Outlook 2003 doesn't support TLS. So is there a way to get iredmail to accept SSL instead of TLS for sending from a client?
I guess even to disable tls altogether is an option if it will get Outlook 2003 to work. I've tried modifying postfix's main.cf to have,
smtpd_use_tls=no
and
smtpd_tls_security_level = none
But this still doesn't work when I set the encryption method to "None" in Outlook. Man, I hate Outlook.