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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 Simple Mail Transfer Protocol ( SMTP) is an Internet standard communication protocol for electronic mail transmission. Mail servers and other message transfer agents use SMTP to send and receive mail messages. User-level email clients typically use SMTP only for sending messages to a mail server for relaying, and typically submit outgoing ...
An e-mail agent is a program that is part of the e-mail infrastructure, from composition by sender, to transfer across the network, to viewing by recipient. The best-known are message user agents (MUAs, aka, e-mail clients) and message transfer agents (MTAs, programs that transfer e-mail between clients), but finer divisions exist.
The Metropolitan Transportation Authority (MTA) provides local and express bus, subway, and commuter rail service in Greater New York, and operates multiple toll bridges and tunnels in New York City. The Metropolitan Transportation Authority ( MTA) is a public benefit corporation responsible for public transportation in the New York City ...
Cable modems are primarily used to deliver broadband Internet access in the form of cable Internet, taking advantage of the high bandwidth of a HFC and RFoG network. They are commonly deployed in the Americas , Asia , Australia , and Europe .
Historically, in Internet mail, both MTA and MSA functions use port number 25, but the official port for MSAs is 587. The MTA accepts a user's incoming mail, while the MSA accepts a user's outgoing mail. The computer running an MSA is also known as the outgoing mail server.
The MTA began offering OMNY contactless cards on October 1, 2021, and introduced fare capping on February 28, 2022. Reduced-fare customers were allowed to use OMNY starting in June 2022 using their own debit or credit cards which must be registered with OMNY. Reduced Fare OMNY cards are expected to be issued in late 2023.
Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail . It is released under the IBM Public License 1.0 which is a free software license. Alternatively, starting with version 3.2.5, it is available under the Eclipse Public License 2.0 at the user's option. [2]
In July 2022, MTA officials announced plans to add cellular service to 418 miles (673 km) of tunnels across the network. In addition, internet service would be added to the 191 subway stations above ground level and the 21 stations in the Staten Island Railway network.
The New York City Transit Authority (also known as NYCTA, the TA, [2] or simply Transit, [3] and branded as MTA New York City Transit) is a public-benefit corporation in the U.S. state of New York that operates public transportation in New York City. Part of the Metropolitan Transportation Authority, the busiest and largest transit system in ...