ishashisp

start->
       cmd->
               telnet remotemailserver 25
                                                        helo localdomainname
                                                                                      
yourmail adress: any address (you can  add virtual address , and try email spoofing)

you will receive message as 250 ok

Recipient mail address->enter 

you will receive message as recipient ok

enter data
enter your message

enter

then you'ill get

message as

message queued