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ustcori.com

Checked 2026-10-22 11:20 UTC · first added 2026-10-21
✗Problems found Score 49 of 100

Domain & DNS

fail

20 passed 3 warn 1 failed

Areas

iRegistration iDelegation ✗Nameservers !SOA !DNSSEC iRecords

Problems

  • ✗
    Nameservers not responding
    Nameservers · These addresses did not answer, so resolvers waste time on timeouts: dns29.hichina.com (2408:4009:501::37): read udp [2a01:4f8:1c1c:eebf::1]:58663->[2408:4009:501::37]:53: i/o timeout.
    #14
  • !
    Serials differ
    SOA · The nameservers serve different versions of the zone: 2013052800 on dns29.hichina.com (139.224.142.109), dns29.hichina.com (139.224.142.99); 2026082509 on dns30.hichina.com (2408:4009:501::38); 2026082616 on dns29.hichina.com (120.76.107.59), dns29.hichina.com (39.96.153.39), dns29.hichina.com (39.96.153.59), dns29.hichina.com (47.118.199.219), dns30.hichina.com (120.76.107.62), dns30.hichina.com (139.224.142.107), dns30.hichina.com (139.224.142.102), dns30.hichina.com (120.76.107.37), dns30.hichina.com (39.96.153.37), dns30.hichina.com (47.118.199.221); 2026082617 on dns29.hichina.com (120.76.107.39), dns29.hichina.com (47.118.199.199), dns30.hichina.com (47.118.199.197), dns30.hichina.com (39.96.153.62). 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 · expire 1d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 1h, retry 20m, expire 1d, negative TTL 10m.
    #23
  • !
    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 ustcori.com ›

Mail

fail

15 passed 4 warn 2 failed

Areas

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

Problems

  • ✗
    No DMARC record
    DMARC · No DMARC record was found for this domain. DMARC is essential for preventing email spoofing. Add a DMARC record with p=reject or at least p=quarantine.
    #5
  • ✗
    No DKIM keys published
    DKIM · _domainkey.ustcori.com does not exist (NXDOMAIN), so no DKIM keys are published. DKIM helps prevent email spoofing. Configure DKIM with your email service provider.
    #7
  • !
    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: mxbiz1.qq.com, mxbiz2.qq.com
    #11
  • !
    Addresses without reverse DNS
    MX · These MX addresses have no PTR record, which many receivers treat as a spam signal: 103.86.78.3 (mxbiz1.qq.com), 103.86.78.2 (mxbiz1.qq.com), 43.154.252.16 (mxbiz2.qq.com), 43.154.252.202 (mxbiz2.qq.com). Ask your hosting provider to set one.
    #30
  • !
    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 ustcori.com ›