-  Confirm your internet connection is working. 
 - Ensure you've entered the correct email address, username, and password. 
 - Check your email settings are correct in your email client. 
 - Ensure your email client is set to download incoming messages. 
 - If you continue to have issues, try using an alternate email client. 
 - Check your email account hasn't been hacked or compromised. 
 
