E-mail definitions beginning with X

An Exchange component that is integrated with the message transfer agent (MTA) and can be configured to connect routing groups within Exchange, or to route messages to other X.400 systems. When handling communication between Exchange and other X.400 systems, it maps addresses and converts Exchange messages to native X.400 messages and vice versa. [Exchange 2003]
Microsoft - Cite This Source - This Definition
Browse Related Terms: link state information, link state table, Routing group, Routing service

An Exchange component integrated with the MTA that can be configured to connect sites within Exchange, or to route messages to foreign X.400 systems. [Exchange 5.5]
Microsoft - Cite This Source - This Definition
Browse Related Terms: address space, MTA (Message Transfer Agent), routing, routing table, X.400 Recommendations

Defines the standard interfaces of an electronic messaging system. These recommendations specify the structure of a message handling system, message structure and components, and the method used to transfer messages. [Exchange 5.5]
Microsoft - Cite This Source - This Definition
Browse Related Terms: address space, MTA (Message Transfer Agent), routing, routing table, X.400 connector

Networking software required to support X.400 server-to-server message transport. [Exchange 5.5]
Microsoft - Cite This Source - This Definition
Browse Related Terms: Internet, Internet News Service, newsgroup, NNTP (Network News Transfer Protocol)

User-defined, unofficial header field that exists in the message header. X-headers are not specifically mentioned in RFC 2822, but the use of an undefined header field starting with "X-" has become an accepted way to add unofficial header fields to a message. Messaging applications, such as anti-spam, antivirus, and messaging server applications may add their own X-headers to a message. X-header fields are usually preserved but ignored by messaging servers and clients that don't use them. [Exchange 2007]
Microsoft - Cite This Source - This Definition
Browse Related Terms: Message Header, SMTP (Simple Mail Transfer Protocol), SPF (sender policy framework), TCP (Transmission Control Protocol), UDP (user datagram protocol)

A markup language that enables users to tag data in order to delimit it, leaving the interpretation of the data to the applications that read it. Unlike Hypertext Markup Language (HTML), which describes the appearance of data, XML describes the structure of data. This makes XML compatible with IBM® Lotus® Domino™, which stores data in structured documents, separate from its presentation.
IBM - Cite This Source - This Definition
Browse Related Terms: DXL (Domino XML), named element, note, Notes application, Notes database, Notes file, NSF (Notes Storage Facility)

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