Please check both your inbox and spam folders to see whether you can locate the email first.
If still you're unable to locate the email, please try to whitelist or add the following domains to your contact list:
If you are using Gmail, you can whitelist the domains by checking the instructions here.
Please try to login/withdraw your tokens again after you have whitelist your address to see if you receive the email now.
If you are still unable to receive email from Coincall system, please contact your email provider directly to see if they have insight into why these emails are bouncing.