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Editor to share with you what is the use of the pop3 protocol in outlook server settings, I believe most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

In the server setup of outlook, pop3 protocol refers to Post Office Protocol version 3, which specifies that the personal computer connects to the mail server of Internet and downloads email. POP3 does not allow users to organize messages on mailboxes; users cannot create different folders on the server.

POP3, the full name is "Post Office Protocol-Version 3", that is, "Post Office Protocol version 3". Is a member of the TCP/IP protocol family, defined by RFC1939. This protocol is mainly used to support the remote management of e-mail on the server using the client. The POP3 protocol that provides SSL encryption is called POP3S.

The POP protocol supports "offline" mail processing. The specific process is: the mail is sent to the server, the e-mail client calls the mail client program to connect to the server, and downloads all unread e-mail. This offline access mode is a store-and-forward service that sends mail from the mail server to a personal terminal machine, usually a PC or MAC. Once the message is sent to the PC machine or MAC, the message on the mail server will be deleted. However, most POP3 mail servers can "only download mail, and the server side does not delete it", that is, the improved POP3 protocol.

Protocol characteristics

Default port of POP3 protocol: 110,

POP3 protocol default transport protocol: TCP

The applicable architecture of POP3 protocol: Cramp S

Access mode of POP3 protocol: offline access

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