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Our online glossary is here to help you make sense of the terminology used in the cell phone industry. It covers mobile technologies, such as 3G and 4G, and even includes a bit of information on smartphone operating systems and the companies that make the cell phones and other mobile technology devices we all use.

What is "POP"?

The Post Office Protocol is a protocol used for the retrieval of email from a mail server. The most common version in use today is POP3. POP is being replaced to some extent by IMAP, which functions in an entirely different manner. POP can not be used for sending outbound email. That task is typically handled by an SMTP mail server.

Also known as: "POP3", "Post Office Protocol"

See Also: IMAP, SMTP

Referred to by: IMAP

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