univ-lyon2.fr

Delegation · The nameservers at the parent and in the zone should be the same. Only in the zone: dns2.univ-lyon1.fr. diogene.univ-lyon2.fr, dns.univ-lyon1.fr, dns2.univ-lyon1.fr, laurel.univ-lyon2.fr report NS diogene.univ-lyon2.fr dns.univ-lyon1.fr dns2.univ-lyon1.fr laurel.univ-lyon2.fr.

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: diogene.univ-lyon2.fr: "9.16.23-RH"; laurel.univ-lyon2.fr: "9.16.23-RH". Hide or replace the version string.

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.

MX · The following MX hosts could not be resolved to IPv6 addresses: mx.univ-lyon2.fr

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

TLS · With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean.

TLS · MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".