singaporeair.com

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-247.akam.net: "41824.6"; a1-247.akam.net: "41824.5"; a12-64.akam.net: "48878.31"; a12-64.akam.net: "48878.33"; a13-65.akam.net: "41824.10"; a13-65.akam.net: "41824.6"; a18-66.akam.net: "48878.32"; a18-66.akam.net: "48878.29"; a20-67.akam.net: "48878.33"; a7-64.akam.net: "41824.4"; a7-64.akam.net: "41824.9". Hide or replace the version string.

Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 2d and in the zone 15m; resolvers may use either.

MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.

DNSSEC · DNSKEY signatures expire at 2026-10-24T22:45:43Z (in 60h0m0s). Check that re-signing works.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits). Rotate to a 2048-bit key.

MX · These MX addresses have no PTR record, which many receivers treat as a spam signal: 52.101.137.2 (singaporeair-com.mail.protection.outlook.com), 2a01:111:f403:cc09::1 (singaporeair-com.mail.protection.outlook.com). Ask your hosting provider to set one.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.