RFC821-Simple Mail Transfer Protocol SMTP Chinese version-2_PHP tutorial

This article comes from: Author: (2001-11-23 08:08:00) 4.1.2. COMMAND syntax format A command is composed of a command code and subsequent parameter fields. The command code consists of four letters and is not case-sensitive. Because the following commands have the same effect: MAIL Mail mail Mail Mail MAIL This also applies to tags that guide any parameter value, such as TO and to. The command code and parameters are separated by one or more spaces. However, parameters in the reply path and forwarding path are case-sensitive. Especially on some hosts, "smith" and "Smith" are not the same user at all. The parameter field consists of a string of variable length, which is ended by . The receiver will not take any action until this sequence is completely received. Square brackets represent optional parameter fields. If not selected, the system selects the default settings. Here are the SMTP commands: HELO MAIL FROM: RCPT TO: DATA RSET SEND FROM: SOML FROM: SAML FROM: VRFY EXPN HELP [

http://www.bkjia.com/PHPjc/531909.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/531909.htmlTechArticleThis article comes from: Author: (2001-11-23 08:08:00) 4.1.2. COMMAND syntax format A command consists of a command code and subsequent parameter fields. The command code consists of four letters and is not case-sensitive. ...