I am in need of help with authorising a DMarc record for my organization. Our current CRM is not allowing us to send out emails or invoices and so we are in a bit of a jam.

I am in need of help with authorising a DMarc record for my organization. Our current CRM is not allowing us to send out emails or invoices and so we are in a bit of a jam. We are attempting to authenticate our own primary domain, but we are not sure if we are currently using a DNS provider. We do use Google services such as G Suite, however. If you are familiar with help us with this domain authentication and can effectively troubleshoot our issue so that we can confidently send out emails then please reach out to me.