Setting up Dynamic DMARC using Name Servers
Login to your Cloudflare Account, and go to DNS.
Select Add record.
Select NS record as the Type and fill out the fields with the following info:
Host: Enter the host name for the NS record.
For Dynamic DMARC, enter the value: _dmarc
Value: Enter the following values:
For Dynamic DMARC enter the following value: ns-dmarc.ondmarc.com
When finished entering information, select Save.
Setting up Dynamic DMARC using CNAME
Login to your Cloudflare Account, and go to DNS.
Select Add record.
Select CNAME as the Type and fill out the fields with the following info:
Host: Enter the host name for the CNAME record.
For Dynamic DMARC, enter the value: _dmarc
Value: Enter the following value:
For Dynamic DMARC enter the value: _dmarc.exampledomain.com._dmarc.smart.ondmarc.com
Note: Make sure to replace exampledomain.com within the example above with your own custom domain
When finished entering information, select Save.
Setting up Dynamic DKIM using Name Servers
Login to your Cloudflare Account, and go to DNS.
Select Add record.
Select NS record as the Type and fill out the fields with the following info:
Host: Enter the host name for the NS record.
For Dynamic DKIM, enter the value: _domainkey
Value: Enter the following value:
For Dynamic DKIM enter the following value: ns-dkim.ondmarc.com
When finished entering information, select Save.
Create a free OnDMARC account to test your configuration.