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

Source: Internet
Author: User
RFC821-simplified Mail Transfer Protocol SMTP Chinese version-2. From: Author: (2001-11-2308: 08: 00) 4.1.2.COMMAND syntax format commands are composed of the command code and its subsequent parameter fields. It consists of four letters, which are case-insensitive. From: Author: (08:08:00) 4.1.2. COMMAND syntax format commands are composed of the imperative code and its subsequent parameter fields. It consists of four letters, which are case-insensitive. Because the following commands serve the same purpose: MAIL Mail mail MaIl, which is also applicable TO the flag of any parameter values for guidance, such as to and. The authorization code and parameters are separated by one or more spaces. However, parameters in the reply path and forwarding path are case-insensitive. Especially on some hosts, "smith" and "Smith" are not a user at all. The parameter field is composed of an indefinite string, which consists The receiver does not take any action until it fully receives the sequence. Square brackets represent optional parameter fields. If not selected, the system selects the default settings. The following is the SMTP command: HELO MAIL FROM: RCPT TO: DATA RSET SEND FROM: SOML FROM: SAML FROM: VRFY EXPN HELP [

Author: (08:08:00) 4.1.2. COMMAND syntax format commands are composed of the COMMAND code and its subsequent parameter fields. It is composed of four letters and is case-insensitive ....

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