Adding a DNS record at GoDaddy
First make sure GoDaddy actually serves your DNS: records only work where your domain's nameservers point. If your domain is registered here but uses another company's nameservers, add the records there instead.
- Open My Products, find your domain and choose DNS (Manage DNS).
- Click Add New Record and choose type TXT or CNAME, as your provider asks.
- For Name enter the host (for DMARC: _dmarc), paste the value and save.
Only one DMARC record may exist per domain. If _dmarc already has one, edit it instead of adding a second.
Changes usually appear within an hour, longer if an old record had a long TTL. Then check your domain.
Steps are typical; menus change. If something doesn't match, check GoDaddy's own help pages.