I have ISP config on a 'perfect' Ubuntu 7.04 server. I can't seem to get the email to work though. When I create an account in outlook and test the settings, it finds the server, but won't accept the user name and password. Ive tried the user names: user1_admin, user1_admin:bluefishgardens, user1_admin:bluefishgardens.com and still no luck. When I try to send a message to my servers email 'firstname.lastname@example.org' from my regular bellsouth account, it bounces with the following error: How do I troubleshoot email issues?