No ANY records found for ns1-at1.proofpoint.com.
Try proofpoint.com instead?
id 53867, opcode QUERY, rcode NOTIMP, flags QR RD RA ;QUESTION ns1-at1.proofpoint.com. IN ANY ;ANSWER ;AUTHORITY ;ADDITIONAL
whatsmydns.net ANY Record Lookup tool lets you query DNS servers and get instant results.
Looking for easier to understand results? Use the Global DNS Checker tool.