SASL AUTH with postfix

Hi,

I just moved from Cyrus SASL to Dovecot SASL, with postfix. Works great, and no issue with non-ascii chars, has i had with Cyrus.

With Cyrus i was getting the username/passwd via SQL, with this:

sql_select: select password from smtp_auth_users where username='%u@%r' and status='true'

worked ok for users with email addresses, and i had some special users that were just a name, like "user-1", and i was able to AUTH it. Postfix had: smtpd_sasl_local_domain = fastmail

and in the database i had the username in the format: user-1@fastmail and worked ok.

How can i have the same with dovecot SASL? Thanks in advanced,