 4.     SMTP. , 14_______________185



  SMTP-     -
.

R 220 BEN-UNIX.ARPA Simple Mail Transfer Service Ready

S HELO USC-ISIF.ARPA

R 250 BBN-UNIX.ARPA

S MAIL FROM:<Smith@USC-ISIF.ARPA>

R 250 OK

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

R 250 OK

S RCPT TO:<Green@BBN-UNIX.ARPA>

R 550 No such user here

S RCPT TO:<Brown@BBN-UNIX.ARPA>

R 250 OK

S DATA

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

S Hey! ...

S ... Bye!

S    .

R 250 OK

S QUIT

R 221 BBN-UNIX.ARPA Service closing transmission channel

 <Green@BBN-UNIX.ARPA>    .
  SMTP-  :

R 220 MIT-Multics.ARPA Simple Mail Transfer Service Ready

S HELO ISI-VAXA.ARPA

R 250 MIT-Multics.ARPA

S MAIL FROM:<Smith@ISI-VAXA.ARPA>

R 250 OK

S RCPT TO:<Jones@MIT-Multics.ARPA>

R 250 OK

S RCPT TO:<Green@MIT-Multics.ARPA>

R 550 No such user here

S RSET

R 250 OK

S QUIT

R 221 MIT-Multics.ARPA Service closing transmission channel