На память публикую sql дамп почтового сервера exim. Взял отсюда. Дамп ниже подразумевает, что БД для екзима создана и юзер назначен

USE `exim`;
CREATE TABLE `admin` (
  `username` varchar(255) NOT NULL default '',
  `password` varchar(255) NOT NULL default '',
  `created` datetime NOT NULL default '0000-00-00 00:00:00',
  `modified` datetime NOT NULL default '0000-00-00 00:00:00',
  `active` tinyint(1) NOT NULL default '1',
  PRIMARY KEY  (`username`),
  KEY `username` (`username`)
);
CREATE TABLE `alias` (
  `address` varchar(255) NOT NULL default '',
  `goto` text NOT NULL,
  `domain` varchar(255) NOT NULL default '',
  `created` datetime NOT NULL default '0000-00-00 00:00:00',
  `modified` datetime NOT NULL default '0000-00-00 00:00:00',
  `active` tinyint(1) NOT NULL default '1',
  PRIMARY KEY  (`address`),
  KEY `address` (`address`)
);
CREATE TABLE `domain` (
  `domain` varchar(255) NOT NULL default '',
  `description` varchar(255) NOT NULL default '',
  `aliases` int(10) NOT NULL default '0',
  `mailboxes` int(10) NOT NULL default '0',
  `maxquota` int(10) NOT NULL default '0',
  `transport` varchar(255) default NULL,
  `backupmx` tinyint(1) NOT NULL default '0',
  `created` datetime NOT NULL default '0000-00-00 00:00:00',
  `modified` datetime NOT NULL default '0000-00-00 00:00:00',
  `active` tinyint(1) NOT NULL default '1',
  PRIMARY KEY  (`domain`),
  KEY `domain` (`domain`)
);
CREATE TABLE `domain_admins` (
  `username` varchar(255) NOT NULL default '',
  `domain` varchar(255) NOT NULL default '',
  `created` datetime NOT NULL default '0000-00-00 00:00:00',
  `active` tinyint(1) NOT NULL default '1',
  KEY `username` (`username`)
);
CREATE TABLE `log` (
  `timestamp` datetime NOT NULL default '0000-00-00 00:00:00',
  `username` varchar(255) NOT NULL default '',
  `domain` varchar(255) NOT NULL default '',
  `action` varchar(255) NOT NULL default '',
  `data` varchar(255) NOT NULL default '',
  KEY `timestamp` (`timestamp`)
);
CREATE TABLE `mailbox` (
  `username` varchar(255) NOT NULL default '',
  `password` varchar(255) NOT NULL default '',
  `name` varchar(255) NOT NULL default '',
  `maildir` varchar(255) NOT NULL default '',
  `quota` int(10) NOT NULL default '0',
  `domain` varchar(255) NOT NULL default '',
  `created` datetime NOT NULL default '0000-00-00 00:00:00',
  `modified` datetime NOT NULL default '0000-00-00 00:00:00',
  `active` tinyint(1) NOT NULL default '1',
  PRIMARY KEY  (`username`),
  KEY `username` (`username`)
);
CREATE TABLE `vacation` (
  `email` varchar(255) NOT NULL default '',
  `subject` varchar(255) NOT NULL default '',
  `body` text NOT NULL,
  `cache` text NOT NULL,
  `domain` varchar(255) NOT NULL default '',
  `created` datetime NOT NULL default '0000-00-00 00:00:00',
  `active` tinyint(1) NOT NULL default '1',
  PRIMARY KEY  (`email`),
  KEY `email` (`email`)
);