Email - Mail Transfer Agent (MTA)


mail transfer agent (MTA) is a software that implements Simple Mail Transfer Protocol (SMTP).

They transport E-Mail messages from one computer to another.

MTAs talk to other MTAs, and either

  • deliver mail locally
  • or hand it off for delivery to an MDA/LDA if it was destined to the local system.

Client MUAs (such as mutt, thunderbird, sylpheed, evolution, kmail) hand off newly sent messages to an MTA.


The well-known MTA are:

Documentation / Reference

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