messaging system

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Related to mail system: Voice Mail System, Tube mail

messaging system

A messaging system sends text messages from one user to one or more other users. Image attachments are also typically supported. This definition covers the components of an Internet-based email system. For text and instant messaging, see text messaging and instant messaging.

Mail User Agent (Client)
The mail user agent (MUA or UA) is the client email program, such as Outlook, Eudora or Mac Mail, which is used to compose, send and receive messages.

Message Transfer Agent (Server)
The message transfer agent (MTA), or "mail transfer agent," is a mail server that forwards messages from user agents (MUAs) or delivers mail to its own message store (MS) for local recipients. Sendmail and Microsoft Exchange are the most widely used MTAs, and in a large enterprise, there may be several MTAs deployed.

Message Store
The message store (MS) holds the mail until it is selectively retrieved and deleted by an access server. A local delivery agent (LDA) writes the messages from the MTA to the message store, and the protocols used to retrieve the mail are POP and IMAP (see POP3 and IMAP4).

The Internet's SMTP
Internet email is based on the SMTP protocol. Prior to the Internet's enormous growth in the late 1990s, numerous proprietary messaging systems were widely used, including cc:Mail, Microsoft Mail, PROFS and DISOSS. See SMTP, messaging middleware, text messaging and instant messaging.
References in periodicals archive ?
Since VA Linux provides the whole mail system from OS to application, customers can expect rich, source code level (including Linux kernel) technical support by VA Linux's able experts.
The voice mail system would include a full range of voice mail and fax mail services, according to Tecnomen.
Network mail systems use software known as "gateways" to handle moving mail between internal and external systems.
Voice mail systems are available through any number of channels, including telephone systems dealers, voice processing manufacturers, subsidiaries of Regional Bell Operating Companies (RBOCS), telecommunications consultants and value-added resellers (VARS).
Finnish telecomms service provider Tecnomen Oyj said today (23 April) that it had been chosen by the Brazilian telecomms operator Telecom Americas to deliver voice mail systems and upgrades to the operator's subsidiaries in Brazil.
NORDIC BUSINESS REPORT-23 April 2003-Tecnomen Oyj delivers voice mail systems and upgrades in Brazil(C)1994-2003 M2 COMMUNICATIONS LTD http://www.