# The username field should include the domain (see example below).
#
# Enabling this option causes ignorance of any other field-related
# options, excluding default domain.
#
# There are two variables, which you can use. Substitution will be made
# for them, so you can put entered username (local part) and domain name
# in the right place of your query. These variables are:
# $(local_part), $(domain), $(service)
#
# If a $(domain) is empty (not given by the remote user) the default domain
# name is used in its place.
#
# $(service) will expand out to the service being authenticated: imap, imaps,
# pop3 or pop3s. Courier mail server only: service will also expand out to
# "courier", when searching for local mail account's location. In this case,
# if the "maildir" field is not empty it will be used in place of
# DEFAULTDELIVERY. Courier mail server will also use esmtp when doing
# authenticated ESMTP.
#
# This example is a little bit modified adaptation of vmail-sql
# database scheme:
#
# MYSQL_SELECT_CLAUSE SELECT CONCAT(popbox.local_part, '@', popbox.domain_name), \
# CONCAT('{MD5}', popbox.password_hash), \
# popbox.clearpw, \
# domain.uid, \
# domain.gid, \
# CONCAT(domain.path,np''/''', popbox.mbox_name), \
#  &p'''''', \
# domain.quota, \