R: 220 USC-ISIF.ARPA Simple Mail Transfer Service Ready S: HELO LBL-UNIX.ARPA R: 250 USC-ISIF.ARPA S: MAIL FROM:<mo@LBL-UNIX.ARPA> R: 250 OK S: RCPT TO:<fred@USC-ISIF.ARPA> R: 251 User not local; will forward to <Jones@USC-ISI.ARPA> S: DATA R: 354 Start mail input; end with <CRLF>.<CRLF> S: Blah blah blah... S: ...etc. etc. etc. S: . R: 250 OK S: QUIT R: 221 USC-ISIF.ARPA Service closing transmission channel Scenario 8
Step 1 -- Trying the Mailbox at the First Host R: 220 USC-ISIF.ARPA Simple Mail Transfer Service Ready S: HELO LBL-UNIX.ARPA R: 250 USC-ISIF.ARPA S: MAIL FROM:<mo@LBL-UNIX.ARPA> R: 250 OK S: RCPT TO:<fred@USC-ISIF.ARPA> R: 251 User not local; will forward to <Jones@USC-ISI.ARPA> S: RSET R: 250 OK S: QUIT R: 221 USC-ISIF.ARPA Service closing transmission channel Step 2 -- Delivering the Mail at the Second Host R: 220 USC-ISI.ARPA Simple Mail Transfer Service Ready S: HELO LBL-UNIX.ARPA R: 250 USC-ISI.ARPA S: MAIL FROM:<mo@LBL-UNIX.ARPA> R: 250 OK S: RCPT TO:<Jones@USC-ISI.ARPA> R: OK S: DATA R: 354 Start mail input; end with <CRLF>.<CRLF> S: Blah blah blah... S: ...etc. etc. etc. S: . R: 250 OK S: QUIT R: 221 USC-ISI.ARPA Service closing transmission channel Scenario 9