Need to use when sending mail protocol
We often use to e-mail, receive e-mail or send a message. However mailbox at work, we will use those protocols? How practical work?
Senders to send messages via SMTP protocol to the client's own mail server, and then through the SMTP protocol own mail server will send the message to the recipient's mail server, the recipient via POP3 protocol or IMAP e-mail protocol will be charged.
IMAP and POP3 What is the difference?
IMAP is an acronym for "Internet Mail Access Protocol", is the Internet Message Access Protocol, mail client can get through this protocol mail server above e-mail messages, mail download, send and so on.
POP3 is "Post Office Protocol - Version 3" abbreviation, is the third version of the Post Office Protocol, the protocol provides for a personal computer connected to the Internet mail server and download e-mail.
1, a range of different download:
the IMAP server without above all mail download (download according to actual needs), the mail may be operated by the mail client.
POP3 mail server allows download the above e-mail (download all unread e-mail), when the message is sent from the server to the top above the computer, and delete the mail server above message.
2, different operating functions
IMAP mail client WebMail provide bidirectional communication, the client above operations (such as: read, delete, move, mail, etc.) will be fed back to the mail server above also when the feedback operation of the above message WebMail to the above e-mail client (ie: in the mail client, browser, e-mail and log in above to view the status of the mailbox is the same).
POP3 operate (such as: read, delete, move messages, etc.) on top of the client will not be fed back to the mail server above, such as: when the mobile client the above messages to another folder, the mail server at the same time does not move above these mail.
3, security,
IMAP offers a more convenient, stable and reliable experience, two-way communication to avoid missing messages through WebMail client.
POP3 e-mail more easily lost and can not download the same message several times.
4, convenience,
IMAP offers from multiple devices (such as: mobile phones, computers, tablets, etc.) to access mail, easy access to e-mail anytime, anywhere. POP3 and can not do this.
Meanwhile, IMAP, like POP e-mail that provides convenient download service, so that users can read offline. IMAP provides a summary of browsing feature lets you read all the information before the mail arrives decision time, subject, sender, size, and so made as to whether downloaded. In addition, IMAP better support access from multiple different devices at any new messages.
In short, IMAP as a whole in order to bring more convenient and reliable experience. POP easier to losing messages or downloading the same messages multiple times, but through two-way synchronization between IMAP mail clients and webmail good to avoid these problems.
TA: Madina
Reprinted: http://www.ie-lab.cn/