Telnet 10.10.10.100 25 Server responce HELO "ore HELO host name" Server responds with: 250 OK MAIL FROM:test@test.com Server responds with: 250 Address Ok. RCPT TO:test01@test01.com Server responds with: 250 test01@test01.com OK DATA Server Responds (or may not): 354 Enter Mail Enter message, then on a new line, .