If you are using secondary domains for creating and sending account, it is recommended to set up forwarding to your main domain. Watch the full detailed video by clicking the link here.
Follow the steps to set up a forwarding in GoDaddy.
Login to your GoDaddy account.
Navigate to your Domain List.
Find the domain that need to be redirect.
Click three dots next to the domain and click Manage DNS.
Scroll down to Forwarding section and click Add Forwarding.
Choose http:// or https:// and enter the domain name.
Select Permanent as Forward type.
Click Save.