Postfix SMTP configuration problem, incorrect login
I'm setting up a postfix mailserver and I have both POP3 and IMAP working but for some reason SMTP will not accept my login. I'm using Debian Testing on a amd64 server.
The user is a local user on the server, and like I said it will accept incoming mail, I can check mail, I just can't login to send mail.
My ultimate goal would be to have multiple users stored in a MySQL database so I don't have to make each one a local user. I've tried reading how-tos but at this point I'm still not seeing what I am missing.