Telnet is a simple but extremely popular protocol for exchanging data between two computers. It is often used for testing computer programs and the Telnet utility is included with Vista, Windows 7 and Windows 8 computers as well though it is not enabled by default.
If you would like to use the Telnet command from the DOS (command) prompt, follow these steps to re-enable the Telnet client on your Windows machine:
- Go to Control Panel – > Programs and Features.
- Click Turn Windows Features on or off.
- Enable Telnet Client and click OK.
That’s it. Open the command prompt, type telnet to make sure it works - may you should try to verify an email address. Alternatively, you may download the Putty SSH utility as it can also be used as Telnet client for Windows.