This method is often used to send a test mail over an exchange relay.The following commands are written on the line.If you mistake write after telnet, you can’t delete word.
Run as administrator cmd
“telnet mail.mustafaturkoglu.net 25”
“helo aa”
“mail from:senduser@mustafaturkoglu.net”
“rcpt to:recipentuser@mustafaturkoglu.net”
“data”
“subject: Hello this is Subject”
“.”
“.”
If you succes you will see such an sentence : ” 250.6.0 <relayasdaskjwe123123@mustafaturkoglu.net> Queed mail for delivery”.