root@artinfo:~# telnet localhost 25 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 mail2.howtobr.org ESMTP MAIL FROM: 250 ok RCPT TO: 250 ok DATA 354 go ahead one line uahuahuha testando so . 250 ok 1175401603 qp 1821 quit 221 mail2.howtobr.org Connection closed by foreign host.