Mail module MX
The MX (mail) module tracks the direct output from the system logger through an exclusive named-pipe.
It comes along with a companion module 'MB' that handles mailbox access issues (login) that MX instantly passes to MB if it detects issues with mailbox access. The MB companion module shares the database of the MX module (see the concepts overview under Watcher concepts )
The MX module itself takes care about mail transport issues related to the MTA (Mail Transport Agent; namely Postfix, Exim, Qmail and the like)