Test SMTP-server with Telnet

To factor out possible SMTP-server issues we can use Telnet to try and establish a connection to the server from the computer.

  1. Type Telnet into the search field in the toolbar at the bottom of your desktop.
  1. Click on Turn Windows features on or off. This opens a pop-up window.
  2. Scroll down to Telnet Client, check the box next to it and press the OK button.
  1. Open up Command Prompt run the prompt bellow, replacing smtp_server with the name of your server and changing 587 with the desired port:
telnet smtp_server 587

Updated on March 28, 2023

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