Wednesday, 8 April 2015

Explain POP3.

POP3


POP3 (Post Office Protocol 3) is the most recent version of a standard protocol for receiving e-mail. POP3 is a client/server protocol in which e-mail is received and held for you by your Internet server. Periodically, you (or your client e-mail receiver) check your mail-box on the server and download any mail, probably using POP3.

•POP3 is designed to delete mail on the server as soon as the user has downloaded it. However, some implementations allow users or an administrator to specify that mail be saved for some period of time. POP can be thought of as a "store-and-forward" service.

•The conventional port number for POP3 is 110.

•POP (Post Office Protocol) defines an email server and a way to retrieve mail from it. Incoming messages are stored at a POP server until the user logs in and downloads the messages to their computer. The current version is POP3.

•While SMTP is used to transfer email messages from server to server, POP is used to collect mail with an email client from a server.

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