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A relay network is a type of network used to send information between two devices, for e.g. server and computer, that are too far away to send the information to each other directly. Thus the network must send or "relay" the information to different devices, referred to as nodes, that pass on the
Until the 1990s, mail servers were commonly intentionally configured as open relays; in fact, this was frequently the installation default setting. [1] The traditional store and forward method of relaying e-mail to its destination required that it was passed from computer to computer (through and beyond the Internet) via modems on telephone lines.
Within the Internet email system, a message transfer agent (MTA), [1] mail transfer agent, [2] or mail relay is software that transfers electronic mail messages from one computer to another using the Simple Mail Transfer Protocol. [3] In some contexts, the alternative names mail server, mail exchanger, or MX host are used to describe an MTA.
The initiating host, the SMTP client, can be either an end-user's email client, functionally identified as a mail user agent (MUA), or a relay server's mail transfer agent (MTA), that is an SMTP server acting as an SMTP client, in the relevant session, in order to relay mail. Fully capable SMTP servers maintain queues of messages for retrying ...
The peer receives the data and responds, again using a UDP datagram as the transport protocol, sending the UDP datagram to the relay address at the TURN server. The TURN server receives the peer UDP datagram, checks the permissions and if they are valid, forwards it to the client.
The first IRC server, tolsun.oulu.fi, a Sun-3 server on display near the University of Oulu computer centre IRC ( Internet Relay Chat ) is a text-based chat system for instant messaging . IRC is designed for group communication in discussion forums, called channels , [ 1 ] but also allows one-on-one communication via private messages [ 2 ] as ...
MM1: the interface between MMS User Agent and MMS Center (MMSC, the combination of the MMS Relay & Server). Delivered as HTTP over a packet switched data session. MM2: the interface between MMS Relay and MMS Server. MM3: the interface between MMSC and other messaging systems. Using SMTP. MM4: the interface between MMSC and foreign network ...
The TS6 protocol is an extension to the Internet Relay Chat protocol for server to server communications developed initially by the developers of ircd-ratbox. It has been extended by various IRC software and has the feature that proper implementations of TS6 can link to each other by using feature negotiation—even if features are disparate.