Sending Email with SMTP Authentication via Telnet or OpenSSL | Windows OS Hub
Barunsoft: >>To send mail using telnet at first you should install windows component Tel Net Server & Tel Net Client.
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How to Test an SMTP Server with Telnet. Step-by-Step Tutorial
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Testing SMTP Server from the Command Line in Online Tools and via Telnet
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telnet is not recognized as an internal or external command - Fixed
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