SurfaceMap › h › hhu.de

hhu.de

Checked 2026-10-21 22:50 UTC · first added 2026-10-21
✗Problems found Score 62 of 100

Domain & DNS

fail

19 passed 2 warn 1 failed

Areas

iRegistration iDelegation ✗Nameservers ✓SOA !DNSSEC !Records

Problems

  • ✗
    Nameservers not responding
    Nameservers · These addresses did not answer, so resolvers waste time on timeouts: selene.rz.uni-duesseldorf.de (134.99.128.5): read udp 46.225.38.91:40571->134.99.128.5:53: i/o timeout; sirene.rz.uni-duesseldorf.de (134.99.128.2): read udp 46.225.38.91:48893->134.99.128.2:53: i/o timeout.
    #14
  • !
    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
  • !
    Very low TTLs
    Records · These records have a TTL below 5m, causing extra queries and slower lookups: MX (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 1h; resolvers may use either.
    #32

Recent checks

✗

Full report

Domain & DNS report for hhu.de ›

Mail

fail

24 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
  • !
    Not enabled
    DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8
  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: a2881.mx.srv.dfn.de, b2881.mx.srv.dfn.de, c2881.mx.srv.dfn.de
    #11
  • !
    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 hhu.de ›