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What is SMTP (Simple Mail Transfer Protocol)?

April 26, 2017mail Protocol simple SMTP transfer

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What is SMTP (Simple Mail Transfer Protocol)?

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SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in the transmission of e-mail. However, it is limited in its ability to receive messages. It is therefore usually used with one of two other protocols — POP3 or Internet Message Access Protocol (IMAP) — that lets the user access messages in a server mailbox and download them periodically from the server. In other words, users typically use a program that utilizes SMTP for sending e-mail and either POP3 or IMAP for receiving messages that have been stored for them at their local server.