Capitolo 473, diapositiva
Simulazione del protocollo SMTP

         mittente                          servente SMTP
.----------------------.                 .--------------.
| tizio@dinkel.brot.dg | - - - - - - - ->| mail.brot.dg |
`----------------------'                 `--------------'
                                                |
               destinatario                     |
         .---------------------.                |
         | caio@roggen.brot.dg |<- - - - - - - -'
         `---------------------'

$ telnet [-8] mail.brot.dg 25[Invio]

Trying 192.168.1.99...
Connected to mail.brot.dg.
Escape character is '^]'.
220 mail.brot.dg ESMTP Exim 3.36 Sun, 24 Nov 2002 13:12:29

HELO brot.dg[Invio]

250 mail.brot.dg Hello tizio at dinkel.brot.dg [192.168.1.1]

MAIL From: <tizio@dinkel.brot.dg>[Invio]

250 <tizio@dinkel.brot.dg> is syntactically correct

RCPT To: <caio@roggen.brot.dg>[Invio]

250 <caio@roggen.brot.dg> is syntactically correct

DATA[Invio]

354 Enter mail, end with "." on a line by itself

Subject: Saluti.[Invio]

Ciao Caio,[Invio]

come stai?[Invio]

bla bla bla...[Invio]

...

Tizio[Invio]

.[Invio]

250 TAA02951 Message accepted for delivery

QUIT[Invio]

221 dinkel.brot.dg closing connection
Connection closed by foreign host.