What is an MUA?

From Wikipedia :

An e-mail client (also mail user agent (MUA) or e-mail reader) is a frontend computer program used to manage e-mail.

Sometimes, the term e-mail client is also used to refer to any agent acting as a client toward an e-mail server, independently of it being a real MUA, a relaying server, or a human typing directly on a telnet terminal. In addition, a web application providing the relevant functionality is sometimes considered an e-mail client.

Test MUA

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