Protocol introduction:
Common email protocols are as follows:
SMTP: Simple Mail Transfer Protocol. Mainly used for sending emails. Typically, mail is sent to one mail server (the SMTP server), then to another (or several) servers, and finally to its destination. SMTP can transmit plain text, but cannot transmit binary data such as pictures, sounds, or movies. SMTP uses the MIME protocol to send binary data over a TCP/IP network. The MIME protocol converts binary data to plain text.
IMAP: Internet Message Access Protocol. Mainly used in the mail client can obtain mail information from the mail server through this protocol to download mail and so on. The main difference between the IMAP protocol and the POP protocol is: if IMAP is connected to the mail server, it will not automatically download the mail to the mail program, the user can check some information of the mail first, and download all the mail when needed. content.
POP/POP3: The POP/POP3 protocol is used by mail programs to retrieve mail from mail servers. If POP and POP3 are connected to the server, all mails in the mailbox will be downloaded to the client.
Exchange: A protocol used in a set of e-mail service systems developed by Microsoft for users. Exchange ActiveSync is a Microsoft Exchange synchronization protocol that allows users to send and receive emails, reply, forward emails, and move email folders. In addition to the improved email experience, your address book, schedule management (schedule reminders, notes and plans) are also synchronized, and you can continue to access this information when working offline. At present, all major mobile phone platforms have embedded ActiveSync client. As long as the user terminal supports this protocol, the Exchange service supported by the mailbox can be used normally.
Common email protocols are as follows:
SMTP: Simple Mail Transfer Protocol. Mainly used for sending emails. Typically, mail is sent to one mail server (the SMTP server), then to another (or several) servers, and finally to its destination. SMTP can transmit plain text, but cannot transmit binary data such as pictures, sounds, or movies. SMTP uses the MIME protocol to send binary data over a TCP/IP network. The MIME protocol converts binary data to plain text.
IMAP: Internet Message Access Protocol. Mainly used in the mail client can obtain mail information from the mail server through this protocol to download mail and so on. The main difference between the IMAP protocol and the POP protocol is: if IMAP is connected to the mail server, it will not automatically download the mail to the mail program, the user can check some information of the mail first, and download all the mail when needed. content.
POP/POP3: The POP/POP3 protocol is used by mail programs to retrieve mail from mail servers. If POP and POP3 are connected to the server, all mails in the mailbox will be downloaded to the client.
Exchange: A protocol used in a set of e-mail service systems developed by Microsoft for users. Exchange ActiveSync is a Microsoft Exchange synchronization protocol that allows users to send and receive emails, reply, forward emails, and move email folders. In addition to the improved email experience, your address book, schedule management (schedule reminders, notes and plans) are also synchronized, and you can continue to access this information when working offline. At present, all major mobile phone platforms have embedded ActiveSync client. As long as the user terminal supports this protocol, the Exchange service supported by the mailbox can be used normally.