norma-online.de

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-198.akam.net: "41824.10"; a1-198.akam.net: "41824.7"; a13-67.akam.net: "41824.9"; a13-67.akam.net: "41824.6"; a18-64.akam.net: "48878.31"; a18-64.akam.net: "48878.27"; a20-65.akam.net: "48878.26"; a20-65.akam.net: "48878.30"; a24-67.akam.net: "48878.30"; a24-67.akam.net: "48878.33"; a3-67.akam.net: "41824.9"; a3-67.akam.net: "41824.7". Hide or replace the version string.

Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change.

DKIM · The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.

MX · The following MX hosts could not be resolved to IPv6 addresses: mx19a.antispameurope.com, mx19b.antispameurope.com, mx19c.antispameurope.com, mx19d.antispameurope.com

DNSSEC · DNSKEY signatures expire at 2026-10-24T09:58:08Z (in 58h0m0s). Check that re-signing works.

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.