COMANDO/RISPOSTA DAL SERVER **********:~# telnet example.com:25 220 paganini32 authsmtp ESMTP server ready HELO example.com 250 paganini32 hello [*.*.*.*], pleased to meet you AUTH LOGIN 334 VXNlcm5hbWU6 utente base64 334 UGFzc3dvcmQ6 password base64 235 2.7.0 … authentication succeeded MAIL FROM: info@example.com 250 2.1.0 sender ok RCPT TO: luca@lucabartoli.it 250 2.1.5 recipient ok DATA 354 enter mail, ..