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Command Line Email FAQ—simple answers to complex questions.


By default, Microsoft Windows does not have a telnet client installed. You have to install the telnet client, otherwise, error message will be displayed:

  • 'Telnet' is not recognized as an internal or external command, operable program or batch file.

How to enable a Telnet?

To enable the telnet client on Windows, run the following command string from Command prompt or Run window:

start /w pkgmgr /iu:"TelnetClient"

This may take a few minutes. Note that this must be done only once.

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