I really don't see why you would have to recompile qmail, and especially
qmail-smtpd. qmail-smtp uses an external password checker like vchkpw.
qmail-send bounces the message if it can't find a match.
The start of the thread indicated that he was having trouble with the chkusr patch to qmail-smtpd -- it was only working for domains with a vpasswd file, even though he was now using the MySQL backend.
Based on his description, I indicated that qmail-smtpd (with chkusr) needed to be re-linked to the libvpopmail built with MySQL support.
-- Tom Collins - [EMAIL PROTECTED] QmailAdmin: http://qmailadmin.sf.net/ Vpopmail: http://vpopmail.sf.net/ Info on the Sniffter hand-held Network Tester: http://sniffter.com/