How do I troubleshoot email account connection issues?

Check if your username, password, and mail server settings are correct, including port numbers, protocol, and authentication type.
Ensure that your firewall settings and antivirus software are not blocking the connection.
Verify whether you are logged onto your network using the correct credentials.
Make sure that you are using the most recent version of your preferred email service.
Contact your email service provider or your IT department to confirm if any server settings have changed recently.
Clear your email client cache and confirm that your web browser supports the email service you are trying to use.
Install updates and run a diagnostic on the email application.