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travelbook.de

Checked 2026-10-22 00:41 UTC · first added 2026-10-21
!Passed with warnings Score 73 of 100

Domain & DNS

warn

26 passed 3 warn 0 failed

Areas

iRegistration iDelegation !Nameservers ✓SOA !DNSSEC iRecords

Problems

  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-130.akam.net: "41824.11"; a1-130.akam.net: "41824.9"; a11-67.akam.net: "41824.11"; a11-67.akam.net: "41824.7"; a14-64.akam.net: "48878.32"; a14-64.akam.net: "48878.29"; a16-65.akam.net: "48878.29"; a16-65.akam.net: "48878.31"; a6-66.akam.net: "48878.26"; a6-66.akam.net: "48878.29"; a7-67.akam.net: "41824.5"; a7-67.akam.net: "41824.11". Hide or replace the version string.
    #17
  • !
    Signatures expire soon
    DNSSEC · The earliest signature expires at 2026-10-27 19:49 UTC (in 139h0m0s). Check that automatic re-signing works.
    #30
  • !
    NSEC3 with extra iterations or salt
    DNSSEC · NSEC3 uses 15 iterations and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Recent checks

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Full report

Domain & DNS report for travelbook.de ›

Mail

warn

24 passed 6 warn 0 failed

Areas

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

Problems

  • !
    Ends with ?all (neutral)
    SPF · SPF record uses ?all (neutral), which gives no protection against unauthorized senders. Use -all or ~all instead.
    #3
  • !
    Single MX host, no backup
    MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.
    #12
  • !
    Subdomains unprotected (sp=none)
    DMARC · DMARC subdomain policy is sp=none, so spoofed mail from subdomains is not blocked. Consider sp=quarantine or sp=reject.
    #20
  • !
    Signatures expire in 139h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-27T19:49:48Z (in 139h0m0s). Check that re-signing works.
    #21
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector1 (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

!

Full report

Mail report for travelbook.de ›