- Check Internet Connection: 
 Ensure that the device is connected to a reliable and secure internet network.
- Check Email Credentials: 
 Confirm all email credentials (such as host address, username, password, and port numbers) are correct.
- Check Email Limits: 
 Verify that email quotas and limits have not been exceeded.
- Check Domain Names: 
 Ensure that the domain name is correct for the specific device.
- Check Firewall: 
 Check that the device’s firewall is not blocking the connection.

