/etc/postfix/vmailbox

# This is a SAMPLE vmailbox mapping file
# run
# postfix reload
# postmap /etc/postfix/vmailbox

craig@virtdomain.com        /var/vmail/craig@virtdomain.com/Maildir/
leslie@virtdomain.com       /var/vmail/leslie@virtdomain.com/Maildir/
nicolew@virtdomain.com      /var/vmail/nicolew@virtdomain.com/Maildir/