cardio-online.fr

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: jasmine.ns.cloudflare.com: "2026.10.2"; joaquin.ns.cloudflare.com: "2026.10.2". Hide or replace the version string.

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: MX (30s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 1d; 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.

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: vade-mx-fr01.hornetsecurity.com, vade-mx-fr02.hornetsecurity.com, vade-mx-eu-fallback01.hornetsecurity.com, vade-mx-eu-fallback02.hornetsecurity.com

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

DMARC · These report addresses are in another domain that has not agreed to receive your reports, so receivers will not send them: mailto:gdespeaux@europa-group.com (needs cardio-online.fr._report._dmarc.europa-group.com). Ask the report provider to publish the record, or check the address.

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.