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isa-guide.de

Checked 2026-10-21 23:00 UTC · first added 2026-10-21
✗Problems found Score 69 of 100

Domain & DNS

warn

22 passed 2 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: ns1.webgo.de: "PowerDNS Authoritative Server 4.7.3"; ns2.webgo.de: "PowerDNS Authoritative Server 4.7.3"; ns3.webgo.de: "PowerDNS Authoritative Server 4.7.3"; ns4.webgo.de: "PowerDNS Authoritative Server 4.7.3". Hide or replace the version string.
    #17
  • !
    Not signed
    DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Recent checks

!

Full report

Domain & DNS report for isa-guide.de ›

Mail

fail

22 passed 5 warn 1 failed

Areas

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

Problems

  • ✗
    Multiple SPF records
    SPF · Found 2 SPF records. Publishing more than one v=spf1 record causes a permerror; merge them into a single record.
    #16
  • !
    Policy: quarantine
    DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.
    #4
  • !
    Not enabled
    DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8
  • !
    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
  • !
    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 isa-guide.de ›