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  • SMTP命令

    SMTP(Simple Mail Transfer Protocol)简单邮件传输协议

    Basic Commands:
    HELO(Hello):标识用户身份
    MAIL FROM:发件人地址
    RCPT TO(Recipient To):接收人地址
    DATA:消息内容
    RSET(Reset):传输终止,会话重置
    VRFY(Verify):验证用户名或邮箱是否存在,大多数邮箱忽略此命令
    NOOP(No operation):让服务器应响应一个OK
    QUIT:关闭连接

    Extended Commands:
    EHLO(Extended Hello):标识用户身份
    AUTH(Authentication):认证连接
    STARTTLS(Start Transport Layer Security):
    SIZE:消息最大值
    HELP:帮助信息

    参考http://www.samlogic.net/articles/smtp-commands-reference.htm

    举例

    C:telnet smtp.163.com 25
    Trying 123.125.50.138…
    Connected to smtp.163.com.
    Escape character is ‘^]’.
    220 163.com Anti-spam GT for Coremail System > (163com[20141201])
    C:helo 163.com
    S:250 OK
    C:auth login
    S:334 dXNlcm5hbWU6
    C:eHVlY2hhb2FtQDE2My5jb20= //base64加密
    S:334 UGFzc3dvcmQ6
    C:MTk5MDA5Mj=
    S:235 Authentication successful
    C:mail from:xuechaoam@163.com
    S:250 Mail OK
    C:rcpt to:xuechaoam@163.com
    S:250 Mail OK
    C:data
    S:354 End data with .
    C:from:1798211707@qq.com
    to:xuechaoam@163.com
    subject:fuck you!

    I love you
    .
    S:250 Mail OK queued as smtp1,C9GowAA3xugOUyRZWsPXAA–.4109S2 1495552836
    C:quit
    S:221 Bye
    Connection closed by foreign host.

    smtp

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  • 原文地址:https://www.cnblogs.com/zhangxuechao/p/11709690.html
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