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maastricht.nl

Checked 2026-10-22 14:21 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

26 passed 2 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration iDelegation iNameservers !SOA ✓DNSSEC ✓Records

Problems

  • !
    Unusual SOA timers
    SOA · negative caching TTL (minimum) 30s is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 3h, retry 1h, expire 7d, negative TTL 30s.
    #23
  • !
    Serial date in the future
    SOA · The serial 2026103065 looks like a date (YYYYMMDDnn) in the future (2026-10-30). It can only grow, so a wrong date can't be undone without a serial wrap-around.
    #26

Recent checks

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Mail

fail

28 passed 3 warn 1 failed

Areas

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

Problems

  • ✗
    Invalid TLS-RPT record
    TLS · Senders ignore the TLS-RPT record because of: report URI "rabjg8no@tls.eu.dmarcadvisor.com" must be mailto: or https:.
    #35
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), k1 (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    Addresses without reverse DNS
    MX · These MX addresses have no PTR record, which many receivers treat as a spam signal: 2a01:8980:1::6 (smtp1.spzl.nl), 2a01:8980:1::6 (smtp2.spzl.nl). Ask your hosting provider to set one.
    #30
  • !
    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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