本文出自: 作者: (2001-11-23 09:08:00)
第二步：转发主机到目的主机

R: 220 BBN-VAX.ARPA Simple Mail Transfer Service Ready

S: HELO USC-ISIE.ARPA

R: 250 BBN-VAX.ARPA

　

S: MAIL FROM:<@USC-ISIE.ARPA:JQP@MIT-AI.ARPA>

R: 250 OK

　

S: RCPT TO:<Jones@BBN-VAX.ARPA>

R: 250 OK

　

S: DATA

R: 354 Start mail input; end with <CRLF>.<CRLF>

S: Received: from MIT-AI.ARPA by USC-ISIE.ARPA ;

2 Nov 81 22:40:10 UT

S: Date: 2 Nov 81 22:33:44

S: From: John Q. Public <JQP@MIT-AI.ARPA>

S: Subject: The Next Meeting of the Board

S: To: Jones@BBN-Vax.ARPA

S:

S: Bill:

S: The next meeting of the board of directors will be

S: on Tuesday.

S: John.

S: .

R: 250 OK

　

S: QUIT

R: 221 USC-ISIE.ARPA Service closing transmission channel

  

确认和发送

R: 220 SU-SCORE.ARPA Simple Mail Transfer Service Ready

S: HELO MIT-MC.ARPA

R: 250 SU-SCORE.ARPA

　

S: VRFY Crispin

R: 250 Mark Crispin <Admin.MRC@SU-SCORE.ARPA>

　

S: SEND FROM:<EAK@MIT-MC.ARPA>

R: 250 OK

　

S: RCPT TO:<Admin.MRC@

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