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Command Tester Help
Command Tester is an advanced utility for testing commands on an open port. When you find an open port, a lot of servers have a HELP command that you can enter, and they will list the commands that are available. You may also want to use the command tester to test an Internet application that you are developing, or maybe to test protocol information for a server.
Let's say that you found a server that has port 25 open. This is most likely an SMTP server. Now you can test sending SMTP commands to the server and see if you can verify that users exist on the machine. Enter the host in the "Host" field, and the port (25) in the "Port" field. Now click "Connect" to attempt to connect to the server.
The first command you must send to an SMTP server is "HELO " followed by a hostname. In the "Send" field at the bottom, type "HELO test" and click "Send" (or hit enter). This will send the HELO command, and the SMTP server should respond. Once you sent that command, you can try verifying users, or sending mail manually even.