In order to enable email authentication for MailChimp, you will need to do the following:


Add MailChimp as enabled sender for your domain in the Valimail Enforce application as described below:

https://docs.valimail.com/enforce/en/domains/add-or-delete-an-enabled-sender.html


The default DKIM keys for MailChimp will be added automatically.


Return to your MailChimp account and click on 'Verify Domain' as described in the steps in this MailChimp link: 

https://mailchimp.com/help/set-up-custom-domain-authentication-dkim-and-spf/#Verify_email_domain_and_copy_records


Once you complete the above steps, you can begin sending authenticated emails using MailChimp.