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How to setup Dynamic Services with Cloudflare

Instructions to setup Dynamic Services (Dynamic DMARC & Dynamic DKIM) using Name Servers and CNAMES with Cloudflare.

Written by Eric Johnson

Setting up Dynamic DMARC using Name Servers

  1. Login to your Cloudflare Account, and go to DNS.
    ​

  2. Select Add record.
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  3. Select NS record as the Type and fill out the fields with the following info:

    1. Host: Enter the host name for the NS record.

      1. For Dynamic DMARC, enter the value: _dmarc

    2. Value: Enter the following values:

      1. For Dynamic DMARC enter the following value: ns-dmarc.ondmarc.com
        ​

  4. When finished entering information, select Save.

Setting up Dynamic DMARC using CNAME

  1. Login to your Cloudflare Account, and go to DNS.
    ​

  2. Select Add record.
    ​

  3. Select CNAME as the Type and fill out the fields with the following info:

    1. Host: Enter the host name for the CNAME record.

      1. For Dynamic DMARC, enter the value: _dmarc

    2. Value: Enter the following value:

      1. 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
        ​

  4. When finished entering information, select Save.

Setting up Dynamic DKIM using Name Servers

  1. Login to your Cloudflare Account, and go to DNS.
    ​

  2. Select Add record.
    ​

  3. Select NS record as the Type and fill out the fields with the following info:

    1. Host: Enter the host name for the NS record.

      1. For Dynamic DKIM, enter the value: _domainkey

    2. Value: Enter the following value:

      1. For Dynamic DKIM enter the following value: ns-dkim.ondmarc.com
        ​

  4. When finished entering information, select Save.

Delegating Subdomains Outside of Cloudflare

Create a free OnDMARC account to test your configuration.

Create a free OnDMARC account

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