Testing the connection confirms that your local network allows outbound traffic on the specific port you are using. For Microsoft’s own services, this is usually tied to your Outlook.
Understanding SMTP Server Ports for Outlook
The critical detail is the port number: use port 587 for STARTTLS encryption, which is the modern standard. com account, the SMTP server address is smtp.
com 587` should result in a connection response from the server, often represented by a 220 code banner. Your SMTP settings for sending do not need to match these ports exactly, but they must point to the correct domain to ensure the email route is logical and secure.
Outlook SMTP Settings Ports Guide
Troubleshooting Connection Tests Open a command prompt and use the "telnet" command to test the port. For example, typing `telnet smtp.
More About How to find my smtp server outlook
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