sh-3.1# telnet mail.gurunet.cl 25
Trying 200.73.5.27...
Connected to mail.gurunet.cl.
Escape character is '^]'.
220 nodo.gurunet.cl SMTP Server
helo
501 Syntax: HELO hostname
helo mail
250 nodo.gurunet.cl
mail from:<>
250 Ok
rcpt to:msn@gurunet.cl
250 Ok
data
354 End data with <CR><LF>.<CR><LF>
:)
.
250 Ok: queued as 8B83C170712
quit
221 Bye
Connection closed by foreign host.
sh-3.1#