A client machine running the Telnet client connects to a CLI on a remote device, most commonly a dedicated platform. The network protocol allows a user to log into another computer within the same network through a TCP/IP connection. If all these steps complete successfully as seen in the screenshots above, then the SMTP server is up and running. Telnet is a client-server protocol predating the TCP protocol. Step 7: Type "quit" to terminate Microsoft telnet utility from the command line: Step 6: Type "quit" to close the connection with the SMTP server. Press the Enter key twice and enter the content of the email body, for instance "Testing message", then press the ENTER key twice to enter a period "." Then press Enter one last time to ensure that the test email is queued for delivery, as shown in the following screen. SSH has replaced telnet for remote access needs, and these days when you hear about telnet, it is usually when somebody is using the client as a generic network troubleshooting tool. Next, type "Subject:" followed by the subject line in this test email. In the early years of computing, telnet was used to connect to the command line on remote systems. Step 5: Type "Data" (without quotes and note the capitalized "D"), and press Enter. You will need to press ENTER after each of thes commands to get to the following screen shot: Then enter "rcpt to: (changing that syntax to the actual email address on the SMTP server). Type "mail from: as a fake email address. Step 4: Enter "helo me" to receive a greeting message from the SMTP server. Press the ENTER key to see the following screen: Step3: Issue the command "open localhost 25" (without quotes) but be sure to change 'localhost' and '25' in this context to the actual SMTP servername and port that you are using.
Type "set LocalEcho" (without quotes) to turn on the Local echo feature: Step2: Issue the command "telnet" (without quotes) and press the ENTER key to get the telnet utility started. Step 1: Click on "start" from menu and choose "run", type "cmd" (without quotes) into text field and click "OK". telnet 10.10.10.24 3306 I use the ctrl character to disconnect. By utilising the Microsoft Telnet command-line utility, one can easily verify the status of an SMTP server (whether it is 'on' or 'off') very quickly by doing the following: I use the telnet command to check if MySQL port is responding.
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