How do I fix error messages when trying to open my emails?

1. Check the email server settings.
2. Confirm that the email address for the sender is correct.
3. Confirm that your antivirus or email security settings will allow the email to be received.
4. Ensure that there is sufficient memory in your device to open the email.
5. Configure SMTP server addresses.
6. Check to see if authentication is required.
7. Restart the device or email service to see if this helps.
8. Check to see if the email application is compatible with the device or email server.