smtp

telnet www.sample.com 25

Server Response: 220 www.sample.com ESMTP Postfix
Client Sending : HELO domain.com
Server Response: 250 Hello domain.com
Client Sending : MAIL FROM: 
Server Response: 250 Ok
Client Sending : RCPT TO: 
Server Response: 250 Ok
Client Sending : DATA
Server Response: 354 End data with .
Client Sending : Subject: Example Message
Client Sending : From: me@domain.com
Client Sending : To: you@sample.com
Client Sending :
Client Sending : Yo,
Client Sending :
Client Sending :   Sending a test message.
Client Sending :