We have bought a Dominic name (Million Plaza ) in GoDaddy and also purchased professional email but sometimes the email is not sent
Do you mean not sent or not received by the person you sent to? Sometimes other email providers require SPF records be added to your domain record to get through to the person you are sending to.
If you don't have an SPF record, give that a try and see if that works. Here's the GoDaddy Help article on that.