[计算机网络原理.英文版.课件Chapter2.ppt

2.4 Simple Mail Transfer Protocol: SMTP * 2.4.1 SMTP(RFC 821) SMTP demo 220 ESMTP ready [28/unknown] HELO 250 HELO: MAIL FROM: spwang@ 250 OK (eyou mta) RCPT TO: spwang@ 250 OK (eyou mta) DATA 354 Please start mail input. This a test for SMTP. . 250 Mail queued for delivery. QUIT 221 Closing connection. Good bye. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2.4 Simple Mail Transfer Protocol: SMTP * 2.4.1 SMTP(RFC 821) SMTP command and status Code 以下是必不可少的命令： HELO 请求发送邮件 MAIL FROM 发信人邮件地址 RCPT TO 收信人邮件地址 DATA 请求输入邮件正文 . 请求结束邮件正文 QUIT 从邮件服务器退出 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2.4 Simple Mail Transfer Protocol: SMTP * 2.4.2 Mail message formats (RFC 822) and MIME 邮件报文格式 From: E-mail address of sender To: E-mail address of receiver Subject: Some key words or other Body of mail …………………… …………………… . Header Lines CR LF Body in ASCII . Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2.4 Simple Mail Transfer Protocol: SMTP * 2.4.2 Mail message formats (RFC 822) and MIME MIME（Multipurpose Internet Mail Extensions) 在RFC 1341、1521、2045、2046中描述 解决二进制文件传送问题 扩展的Key Header lines: Content-Type: Type/subtype;parameters Content-Transfer-Encoding: encoding-method MIME-Version: version Content-Description: description of message content (text) Content-ID: ID of this message Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2.4 Simple Mail Transfer Protocol: SMTP * 2.4.2 Mail message formats (RFC 822) and MIME MIME（Multipurpose Internet Mail Extensions) Content-type中的parameter Charset=char-set 用来指定字符集，例如us-ascii、ISO-8859-1等 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2.4 Simple Mail Transfer