SurfaceMap › r › revell.de

revell.de

Checked 2026-10-22 00:00 UTC · first added 2026-10-21
✗Problems found Score 66 of 100

Domain & DNS

warn

23 passed 4 warn 0 failed

Areas

iRegistration iDelegation iNameservers !SOA !DNSSEC !Records

Problems

  • !
    Serials differ
    SOA · The nameservers serve different versions of the zone: 2026103563 on a.managed-ns.com (192.174.68.102), a.managed-ns.com (2001:67c:1bc::102); 2026103564 on b.managed-ns.de (176.97.158.102), b.managed-ns.de (2001:67c:10b8::102). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22
  • !
    Unusual SOA timers
    SOA · negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 12h, retry 2h, expire 14d, negative TTL 1m.
    #23
  • !
    Signatures expire soon
    DNSSEC · The earliest signature expires at 2026-10-29 00:00 UTC (in 168h0m0s). Check that automatic re-signing works.
    #30
  • !
    Very low TTLs
    Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m), NS (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 1m; resolvers may use either.
    #32

Recent checks

!

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Mail

fail

22 passed 4 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
  • !
    Single MX host, no backup
    MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.
    #12
  • !
    No aggregate reports (rua)
    DMARC · DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...
    #19
  • !
    Signatures expire in 168h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-29T00:00:00Z (in 168h0m0s). Check that re-signing works.
    #21
  • !
    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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