所有stmp命令.txt

大量Delphi开发资料

收信服务器要能够收到别人发过来的电子邮件
按你的要求，是要写一个SMTP服务器，接受其他服务发来的邮件
以下是所有STMP命令：
            HELO   
            MAIL  FROM: 
            RCPT  TO: 
            DATA 
            RSET 
            SEND  FROM: 
            SOML  FROM: 
            SAML  FROM: 
            VRFY   
            EXPN   
            HELP [ ] 
            NOOP 
            QUIT 
            TURN 
其中   HELO
       MAIL
       RCPT
       DATA
       RSET
       NOOP
       QUIT
为最常用SMTP命令，使用这些命令你可以写出你想要的收信服务器
这些你都可以通过TELNET到任意一台收信服务器，如smtp.163.net上观察

以下是服务器对连接命令的返回代码
         211 System status, or system help reply
         214 Help message
            [Information on how to use the receiver or the meaning of a
            particular non-standard command; this reply is useful only
            to the human user]
         220  Service ready
         221  Service closing transmission channel
         250 Requested mail action okay, completed
         251 User not local; will forward to 
          
         354 Start mail input; end with .
          
         421  Service not available,
             closing transmission channel
            [This may be a reply to any command if the service knows it
            must shut down]
         450 Requested mail action not taken: mailbox unavailable
            [E.g., mailbox busy]
         451 Requested action aborted: local error in processing
         452 Requested action not taken: insufficient system storage
          
         500 Syntax error, command unrecognized
            [This may include errors such as command line too long]
         501 Syntax error in parameters or arguments
         502 Command not implemented
         503 Bad sequence of commands
         504 Command parameter not implemented
         550 Requested action not taken: mailbox unavailable
            [E.g., mailbox not found, no access]
         551 User not local; please try 
         552 Requested mail action aborted: exceeded storage allocation
         553 Requested action not taken: mailbox name not allowed
            [E.g., mailbox syntax incorrect]
         554 Transaction failed

详细内容你可以参考RFC 821协议