Pošta
Smith pošilja pošto iz strežnika Alpha.ARPA, Jonesu, Greenu in Brownu na strežnik Beta.ARPA:
S: MAIL FROM:
R: 250 OK
S: RCPT TO:
R: 250 OK
S: RCPT TO:
R: 550 No such user here
S: RCPT TO:
R: 250 OK
S: DATA
R: 354 Start mail input; end with
S: Blah blah blah...
S: ...etc. etc. etc.
S:
R: 250 OK
Pošto sta prejela Jones in Brown. Green nima poštnega nabiralnika na strežniku Beta.