Most of the servers will require extensions request before proceeding with another commands. To terminate procedure at any time type quit. This means that SMTP server responded to our connection request.Īfter server prompt received we can submit all required data to form and send email. If server is reachable and SMTP service is listening port 25 you will see prompt looking like this:Ģ20 Microsoft ESMTP MAIL Service ready at Tue, 10:57:16 +0300 To verify that remote SMTP server is reachable to you, open shell prompt and type: If you're using Windows, make sure you have Telnet-client programm installed. This commands can be executed on Linux and Windows. Testing remote SMTP server reachability Telnet is a simple tool that can be practically used to test open ports on remote hosts, but also could be used to send emails on example.
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