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ensma.fr

Checked 2026-10-22 02:45 UTC · first added 2026-10-21
✗Problems found Score 78 of 100

Domain & DNS

warn

26 passed 2 warn 0 failed

Areas

iRegistration !Delegation iNameservers ✓SOA iDNSSEC !Records

Problems

  • !
    Nameservers in one network
    Delegation · all IPv4 addresses are in 193.55.167.0/24; all IPv6 addresses are in 2001:660:6504::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • !
    Very low TTLs
    Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (2m), AAAA (2m), MX (2m). 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.
    #32

Recent checks

!

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Mail

fail

29 passed 2 warn 1 failed

Areas

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

Problems

  • ✗
    Policy not reachable
    TLS · The MTA-STS record exists but the policy could not be fetched, so senders ignore MTA-STS: Get "https://mta-sts.ensma.fr/.well-known/mta-sts.txt": context deadline exceeded (Client.Timeout exceeded while awaiting headers).
    #33
  • !
    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

Recent checks

✗

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