mysql>  GRANT ALL ON mailscanner.* TO mailwatch@localhost IDENTIFIED BY 'password';

Query OK, 0 rows affected (0.12 sec)

Для интереса посмотрим созданные таблицы.

mysql> SHOW TABLES;

+----------------------------+

| Tables_in_mailscanner      |

+----------------------------+

| audit_log                  |

| blacklist                  |

| geoip_country              |

| inq                        |

| maillog                    |

| mcp_rules                  |

| mtalog                     |

| outq                       |

| sa_rules                   |

| saved_filters              |

| user_filters               |

| users                      |

| whitelist                  |