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stusta.de

Checked 2026-10-22 00:31 UTC · first added 2026-10-21
✗Problems found Score 78 of 100

Domain & DNS

warn

30 passed 1 warn 0 failed

Areas

iRegistration ✓Delegation !Nameservers ✓SOA ✓DNSSEC ✓Records

Problems

  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: dns1.lrz.de: "9.20.29-1~deb13u1-Debian"; dns2.lrz.bayern: "9.20.29-1~deb13u1-Debian"; dns3.lrz.eu: "9.18.49-1~deb12u2-Debian"; esel.stusta.mhn.de: "9.20.30-1~deb13u1-Debian". Hide or replace the version string.
    #17

Recent checks

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Full report

Domain & DNS report for stusta.de ›

Mail

fail

25 passed 3 warn 1 failed

Areas

!SPF ✗DMARC ✓DKIM ✓DNSSEC iMX !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
  • !
    Ends with ?all (neutral)
    SPF · SPF record uses ?all (neutral), which gives no protection against unauthorized senders. Use -all or ~all instead.
    #3
  • !
    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
  • !
    Not configured
    TLS · MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".
    #35

Recent checks

✗

Full report

Mail report for stusta.de ›