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Glossary Term: 

Simple Mail Transfer Protocol (SMTP)

One of the most common and popular protocols for email communication over the Internet and it provides intermediary network services between the remote email provider or organizational email server and the local user accessing it. SMTP is composed of four key components, local user or client-end utility known as the mail user agent (MUA), server known as mail submission agent (MSA), mail transfer agent (MTA), and mail delivery agent (MDA).

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