This tool allows you to check the DNS records you have set up for e-mail authentication and to check whether or not they have valid DKIM records for the same domain name selection.
Just like the SPF Record Checkers, it tests the domain names and tries to find them in the published DKIP records of the same domain.
Alternatively, you can use a web-based DMARC lookup tool to determine the orientation of the Domain Policy. It also includes a number of tools for generating DMARC datasets and DMARC Analyzer.
