This is some old info I found and thought it still my be handy. I will update more about how to install Telnet and refine this up a bit but wanted to throw it up here so I did not forget. I also want to test to see if it still works which I think it should unless TLS is the ONLY way now.
- Open command prompt
- find the mx record for the domain
- Nslookup
- set type=mx
- Americanrampcompany.com
- exit
- after that telnet to the mx record name on port 25. (if you press backspace and enter a command the command will fail. You must enter it correctly the first time with no backspaces)
- telnet mail.example.com 25
- type a hello message
- ehlo mail.example.com
- if that does not work try
- helo mail.example.com
- Enter the from email address you want to use
- Enter the to email address. (Use a valid address)
- rcpt to:test@tes.com
- Type the follow to let the server know you are going to send some data
- DATA
- now type the subject then press enter twice
- subject: Test Message
- Type in the body
- this is a test message you will not see a response from this command.
After the body message press enter then type . (period) and then press enter again so it knows you are done with the body
- The email should have sent
- quit
