user = mail-user
password = PASSWD
dbname = mail-db
hosts = sql3.ne0.pl

query = SELECT `domain` FROM `mailbox` WHERE `domain` = 'ne0.pl' AND `actived` = '1' GROUP BY `domain`

-----------------------
table mailbox:

CREATE TABLE IF NOT EXISTS `mailbox` (
  `username` varchar(255) NOT NULL,
  `password` varchar(255) NOT NULL,
  `name` varchar(255) character set utf8 NOT NULL,
  `maildir` varchar(255) NOT NULL,
  `domain` varchar(255) NOT NULL,
  `actived` tinyint(1) NOT NULL default '1',
  PRIMARY KEY  (`username`),
  KEY `domain` (`domain`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COMMENT='Postfix Admin - Virtual Mailboxes';

INSERT INTO `mailbox` (`username`, `password`, `name`, `maildir`, `domain`, `actived`) VALUES
('dupa', '2qLV1Y4k7g9y6', 'dupa', '', 'ne0.pl', 1);