royalcaribbean.com

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-96.akam.net: "41824.9"; a1-96.akam.net: "41824.10"; a14-67.akam.net: "48878.33"; a14-67.akam.net: "48878.30"; a16-64.akam.net: "48878.33"; a16-64.akam.net: "48878.30"; a3-65.akam.net: "41824.8"; a3-65.akam.net: "41824.11"; a5-66.akam.net: "41824.7"; a5-66.akam.net: "41824.5"; a6-67.akam.net: "48878.26"; a6-67.akam.net: "48878.32". Hide or replace the version string.

SOA · refresh 15m is outside 20m–1d; retry 15m should be shorter than refresh 15m. Current values: refresh 15m, retry 15m, expire 28d, negative TTL 15m.

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

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 1h; resolvers may use either.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

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

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

MX · The following MX hosts could not be resolved to IPv6 addresses: us-smtp-inbound-1.mimecast.com, us-smtp-inbound-2.mimecast.com

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.