What Is a Mail Transfer Agent?

April 10, 2023

An MTA (mail/message transfer agent) is the software running on a mail server responsible for transferring emails between the sender's and recipient's computer. The email delivery process includes an MTA, MSA (message submission agent), and MUA (mail user agent - also known as the email client). Examples of MTAs are Microsoft Exchange, Amazon SES, Sendmail, etc.

Anastazija is an experienced content writer with knowledge and passion for cloud computing, information technology, and online security. At phoenixNAP, she focuses on answering burning questions about ensuring data robustness and security for all participants in the digital landscape.