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:

• Email - Postfix
• Email - Sendmail (Linux)
• https://www.exim.org/ Exim is a message transfer agent (MTA) developed at the University of Cambridge

• https://doc.dovecot.org/admin_manual/mta/