If you domain is displaying that DMARC is not active please ensure that you have a valid DMARC record published in DNS and that it has been at least 24 hours since your domain was created. 

An easy way to check to ensure that your DMARC record is published is to visit https://www.hardenize.com and review their email section.

If you have verified that your DMARC record is published, and you are sending emails from that domain but the domain is still not active. Please open a support request.