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In general, POP3 is a usable protocol; The difference between IMAP and POP3 is that IMAP is used to transmit messages between networks in ciphertext, which is more secure than the plaintext transmission of POP3. IMAP (Internet Message Access Protocol) is another protocol corresponding to POP3, which is a multi-mailbox email system developed by Stanford University in the United States in 1986. It is able to obtain information about e-mail from the mail server or receive mail directly, which has the advantages of high performance and scalability.
IMAP is used by many client-side email software, such as OutlookExpress, NetscapeMessenger, etc., and there are more and more server-side software that supports IMAP, such as CriticalPath, Eudora, iPlanet, Sendmail, etc. POP3 (Post Office Protocol 3) POP is an email protocol for the offline model of the CS structure, which has been developed into its third version and is called POP3. , which regulates how to connect a personal computer to an Internet mail server and an electronic protocol for e-mail.
It is the first offline protocol standard for Internet e-mail, POP3 allows users to store messages from the server to the local host (i.e., their own computer) and delete the messages saved on the mail server, while the POP3 server is the receiving mail server that follows the POP3 protocol and is used to receive e-mail
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IMAP provides two-way communication between Webmail and the email client, and the client's operations will be fed back to the server, and the operations performed on the email will be performed by the mail on the server will also do corresponding actions. At the same time, IMAP, like POP3, provides a convenient email** service that allows users to read offline. The summary browsing feature provided by IMAP allows you to make a decision only after reading all the information such as the arrival time, subject, sender, and size of the email.
In addition, IMAP better supports the ability to access new messages at any time from multiple different devices. Overall, IMAP brings a more convenient and reliable experience to users overall. POP3 makes it easier to lose or repeat the same message multiple times, but IMAP avoids these problems with a two-way synchronization between the mail client and Webmail.
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Answer] The difference between :p OP3 and IMAP4 is Zao Qilu: using the POP protocol, the email ** on the server is processed locally, and any processing is local; It is the IMAP4 protocol, and the local processing is actually processed on the server after interacting with the server. Side-finch.
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IMAP provides two-way communication between Webmail and the email client, and the client's actions will be fed back to the server, and the operations on the email will be performed on the server.
The following table compares to see how IMAP and POP differ when using the client
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IMAP is the abbreviation of "Internet Mail Access Protocol", which is an Internet mail access protocol through which mail clients can obtain mail information, emails, and sends.
POP3 is an abbreviation for "Post Office Protocol - Version 3", which is the 3rd version of the Post Office Protocol and specifies the protocol for personal computers to connect to mail servers and e-mail on the Internet.
POP3 allows the mail server to send all unread emails from the server to the computer and delete the mail from the mail server (many mail servers currently support "no email, do not delete the email, or send a reminder").
IMAP provides two-way communication between Webmail and the email client, and the operations on the client (such as: read, delete, mobile mail, etc.) will be fed back to the mail server, and the email will also be fed back to the email client when the email is operated on Webmail (i.e., log in to the mailbox on the mailbox client and browser to view Sun Bang's email and the status is the same).
POP3 operations on the client (e.g., read, delete, move emails, etc.) will not be fed back to the mail server, for example, when moving the emails on the client to other folders, the mail server will not move these emails at the same time.
iMap provides a more convenient, stable, and reliable user experience, and two-way communication with the client through Webmail can avoid email loss.
5. iMap provides access to emails from multiple devices (such as mobile phones, computers, tablets, etc.), which is convenient for checking emails anytime and anywhere.
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