MX record: see Mail Exchanger (MX) record.
Mail Exchanger (MX) record: A record that includes information about an external mail server. You can specify more than one mail server.
Mailing lists: A email distribution list commonly used to circulate topic discussions. A mailing list includes a set of list members. Whenever a list member posts an email message to the mailing list email address, that email message is distributed to all list members.
Majordomo: A tool that allows you to create and edit mailing lists.
Max Users: The maximum number of simultaneous users on a domain.
Memory Quota: The amount of memory assigned to a user. This amount is based on the Service Level Agreement.
Menu Bar: A row of menu options on the GUI.
MySQL Database Server: A widely used relational database management system for SQL databases. A relational database stores data in separate tables rather than in one big table. A database management system allows you to add, access, and process data stored in an SQL database.