English Computing Dictionary
◊ MESSAGE TRANSFER AGENT
Message Transfer Agent
(MTA) The program responsible for delivering
{e-mail} messages. Upon receiving a message from a {Mail User
Agent} or another MTA it stores it temporarily locally and
analyses the recipients and either delivers it (local
addressee) or forwards it to another MTA ({routing}). In
either case it may edit and/or add to the message {headers}.
The most widely used MTA for {Unix} is {sendmail}.
[Other OSes?]
(1997-02-28)