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insa-lyon.fr

Checked 2026-10-22 03:30 UTC · first added 2026-10-21
✗Problems found Score 56 of 100

Domain & DNS

warn

22 passed 3 warn 0 failed

Areas

iRegistration !Delegation ✓Nameservers !SOA !DNSSEC ✓Records

Problems

  • !
    NS sets differ
    Delegation · The nameservers at the parent and in the zone should be the same. Only in the zone: reld01.insa-rennes.fr. dns.univ-lyon1.fr, dns2.univ-lyon1.fr, reld01.insa-rennes.fr report NS dns.univ-lyon1.fr dns2.univ-lyon1.fr reld01.insa-rennes.fr.
    #7
  • !
    Serials differ
    SOA · The nameservers serve different versions of the zone: 2023483175 on dns2.univ-lyon1.fr (134.214.100.245), dns2.univ-lyon1.fr (2001:660:5001:100::245); 2023483178 on dns.univ-lyon1.fr (134.214.100.6), dns.univ-lyon1.fr (2001:660:5001:100::6), reld01.insa-rennes.fr (193.52.94.2). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22
  • !
    Not signed
    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.
    #27

Recent checks

!

Full report

Domain & DNS report for insa-lyon.fr ›

Mail

fail

22 passed 5 warn 2 failed

Areas

✓SPF ✗DMARC !DKIM !DNSSEC !MX !TLS ✗BIMI

Problems

  • ✗
    Policy: none (monitoring only)
    DMARC · DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.
    #4
  • ✗
    DMARC not strict enough for BIMI
    BIMI · Mail clients will not show the logo. BIMI requires DMARC p=quarantine or p=reject (now p=none), a subdomain policy other than sp=none.
    #39
  • !
    Not enabled
    DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8
  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: mx1.relay.renater.fr, mx2.relay.renater.fr
    #11
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    Not configured
    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.
    #32
  • !
    No certificate (a=)
    BIMI · The logo is published without a Verified Mark Certificate. Gmail and Apple Mail only show BIMI logos with a VMC or CMC; Yahoo shows it without one.
    #38

Recent checks

✗

Full report

Mail report for insa-lyon.fr ›