We had a customer discontinue their email package from Godaddy and started to just use the CPanel email. A week later customer wasn’t receiving emails. I could login in to the webmail and send, but I couldn’t receive.
The issue was with the DNS and the mail record. The MX had 2 records and the 2 CName had two mail records that needed to be deleted and a MX & an A record needed to be added.
Here is the link I got from Godaddy that gave me the settings I needed.
You can quickly access your DNS in a Godaddy account by going to https://dcc.secureserver.net.
Let us know if this helped you…