No ANY records found for mx1.proofpoint.com.gslb.pphosted.com.
Try proofpoint.com.gslb.pphosted.com instead?
id 33935, opcode QUERY, rcode NOTIMP, flags QR RD RA ;QUESTION mx1.proofpoint.com.gslb.pphosted.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.