What email protocol is smtp?

smtp is the protocol for email transmission. SMTP is an email service built on the FTP file transfer service. It is mainly used to transfer email information between systems and provide notifications about incoming letters. The SMTP protocol belongs to the TCP/IP protocol suite, which helps each computer find the next destination when sending or relaying letters.

#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

SMTP is a protocol that provides reliable and efficient email transmission. SMTP is an email service built on the FTP file transfer service. It is mainly used to transfer email information between systems and provide notifications about incoming letters.

SMTP is independent of a specific transmission subsystem and only requires the support of a reliable and orderly data flow channel. One of the important features of SMTP is its ability to transmit emails across the network, that is, "SMTP mail relay".

Using SMTP, mail transmission can be realized between the same network processing processes, and mail transmission between a certain processing process and other networks can also be realized through a relay or gateway.

Function

SMTP is a set of rules for transmitting mail from a source address to a destination address, and controls how letters are relayed. The SMTP protocol belongs to the TCP/IP protocol suite, which helps each computer find the next destination when sending or relaying letters. Through the server specified by the SMTP protocol, we can send the E-mail to the recipient's server. The whole process only takes a few minutes. The SMTP server is a sending email server that follows the SMTP protocol and is used to send or relay emails sent by users.

SMTP is a protocol that provides reliable and efficient email transmission. It is an email service built on the FTP file transfer service. It is mainly used to transfer email information between systems and provide notifications about incoming letters.

One of the important features of SMTP is its ability to transmit mail across the network, also known as "SMTP mail relay". Using SMTP, mail transmission can be realized between processors on the same network, and mail transmission between a certain processor and other networks can also be realized through a relay or gateway. Mail exchange servers with Domain Name Service (DNS) functionality can also be used to identify the next-hop IP address for transmitting mail.

If you want to read more related articles, please visit PHP Chinese website! !

The above is the detailed content of What email protocol is smtp?. For more information, please follow other related articles on the PHP Chinese website!