Mail Server Terms

This all might be a bit confusing to understand at first, but it’s actually quite straight forward once you get to know all of the terms. Included some more information below which will help you to remember some of the terms and their role in a mail server.

MTA – Mail Transfer Agent – Sendmail, Postfix

MDA – Mail Delivery Agent – Procmail

MUA – Mail User Agent – Outlook, Thunderbird

SMTP – Simple Mail Transfer Protocol – Sendmail, Postfix

POP3 – Post Office Protocol 3 – Dovecot

IMAP – Internet Message Access Protocol – Dovecot