We are using DNSSEC for our Public DNS server but, when we do a chech for DNSSEC it's giving the following error. DNSSEC existence close Verdict: At least one of your mail server domains is insecure, because it is not DNSSEC signed. Test explanation: We check if the domains of your mail servers (MX) are DNSSEC signed. Note: the validity of the signature is not part of this subtest, but part of the next subtest. Technical details: Domain of mail server (MX) DNSSEC existent .mail.protection.outlook.com. no