After some googling, I managed to find the public key corresponding to that selector in a github repo: https://github.com/PaloAltoNetworks/aws-elb-autoscaling/b

After some googling, I managed to find the public key corresponding to that selector in a github repo: https://github.com/PaloAltoNetworks/aws-elb-autoscaling/blob/master/Version-2.0/lambda-docs/cft_code/dnslib/test/20120113._domainkey.gmail.com.-TXT https://github.com/PaloAltoNetworks/aws-elb-autoscaling/blob... edit: Seems to be an old test vector for dnslib: https://github.com/paulc/dnslib/blob/d806cfc828d6bbae45c9b4cb7d5e32818aa1f547/dnslib/test/20120113._domainkey.gmail.com.-TXT https://github.com/paulc/dnslib/blob/d806cfc828d6bbae45c9b4c...