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SMTD协议是Simple Mail Transfer Protocol(简单邮件传输协议)的简称,SMTP协议和POP3协议互为姐妹协议,这二个协议都和互联网上使用最广泛的Email(电子邮件)有着密切的关系。发送电子邮件使用的是SMTP协议,接收电子邮件使用的是POP3协议。SMTP协议其实是一种客户端/服务器协议。它定义了一套基于文本的内容命令,用于客户
The SMTD protocol is short for the Simple Mail Transfer Protocol (Simple Mail Transfer Protocol). The SMTP and POP3 protocols are sister protocols to each other. Both of these protocols are closely related to the most widely used Email (email) on the Internet. Send email using the SMTP protocol, receive e-mail using the POP3 protocol. The SMTP protocol is actually a client / server protocol. It defines a set of text-based content commands for the client