mailcow-dockerized/data/conf/dovecot/sql/dovecot-mysql.conf

driver = mysql
connect = "host=mysql dbname=mailcow user=mailcow password=mysafepasswd"
default_pass_scheme = SSHA256
password_query = SELECT password FROM mailbox WHERE kind = '' AND username = '%u' AND domain IN (SELECT domain FROM domain WHERE domain='%d' AND active='1')
user_query = SELECT CONCAT('maildir:/var/vmail/',maildir) AS mail, 5000 AS uid, 5000 AS gid, concat('*:bytes=', quota) AS quota_rule FROM mailbox WHERE kind = '' AND username = '%u' AND active = '1'
iterate_query = SELECT username FROM mailbox WHERE active='1' AND kind='';