Error: Django SMTP Sender Refused

What's Causing This Error

This error occurs when due to authentication problems with the SMTP server.

Solution - Here's How To Resolve It

Ensure that you are providing the correct username and password for authentication. Additionally, ensure that you connect to the correct port based on SSL or TLS.

Please note that if you connect to the Google SMTP servers, enable "Less Secure Sign-In" for the sender account.