SMTP Authentication for Virtual Users

Ok, I am having a problem and several searches as well as every attempt to find the problem myself is not working.

Virtual domains are installed.

the problem is that the virtual domain user (example: login username ) works fine, can recieve, can send. No problem

The virtual user ( username@domain.com) can receive but cannot send. SMTP keep asking over and over for the password. I KNOW the password is correct… but it still asks for password.

I have not yet been able to find a message. /var/log/maillog has NO entries in it since server started Oct 15th (which seems wierd to me) . Thunderbird error is merely “Unknown Reason”

I have a server with username@domain format (CentOS). In /etc/sysconfig/saslauthd you need this:

FLAGS="-r"

(Then restart: /etc/init.d/saslauthd restart )

Any good?