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sudouest.fr

Checked 2026-10-22 05:21 UTC · first added 2026-10-21
✗Problems found Score 81 of 100

Domain & DNS

warn

26 passed 1 warn 0 failed

Areas

iRegistration !Delegation iNameservers ✓SOA iDNSSEC iRecords

Problems

  • !
    Nameservers in one network
    Delegation · all IPv4 addresses are in 83.166.143.0/24; all IPv6 addresses are in 2001:1600::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10

Recent checks

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Mail

fail

25 passed 2 warn 1 failed

Areas

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

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
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), google (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

Recent checks

✗

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