Be more specific what error do you get? In my case I get "Cannot sync message" when try send mail, not even sure it related to this thread but just getting desperate test everything to get it to work.. Btw.. SMTP is always PITA if not using those big cooperations like google and so on
0 - No auth 1 - Login (commonly used, but obsoleted by Plain) 2 - Plain (commonly used) 3 - CRAM-MD5