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tudou.com

Checked 2026-10-22 11:13 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

24 passed 1 warn 1 failed 1 errors

lookups failed for dnssec; results are incomplete

Areas

iRegistration iDelegation ✗Nameservers !SOA iDNSSEC iRecords

Problems

  • ✗
    Nameservers not responding
    Nameservers · These addresses did not answer, so resolvers waste time on timeouts: dns2.youku.com (106.11.41.145): read udp 46.225.38.91:52594->106.11.41.145:53: i/o timeout; dns2.youku.com (106.11.35.17): read udp 46.225.38.91:38672->106.11.35.17:53: i/o timeout.
    #14
  • !
    Unusual SOA timers
    SOA · expire 1h is shorter than 7d; secondaries stop answering too soon when the primary is down; expire 1h must be longer than refresh + retry. Current values: refresh 1h, retry 20m, expire 1h, negative TTL 6m.
    #23

Recent checks

!

Full report

Domain & DNS report for tudou.com ›

Mail

fail

17 passed 6 warn 2 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
  • ✗
    No DKIM keys published
    DKIM · _domainkey.tudou.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: mx1.tudou.com, mx2.tudou.com
    #11
  • !
    Hosts are CNAMEs
    MX · MX records must point to a host name with A/AAAA records, not to a CNAME: mx2.tudou.com -> mx1.alibaba-inc.com
    #22
  • !
    Report address not authorized
    DMARC · These report addresses are in another domain that has not agreed to receive your reports, so receivers will not send them: mailto:dmarc_alibaba@service.alibaba.com (needs tudou.com._report._dmarc.service.alibaba.com). Ask the report provider to publish the record, or check the address.
    #29
  • !
    Addresses without reverse DNS
    MX · These MX addresses have no PTR record, which many receivers treat as a spam signal: 47.246.137.48 (mx1.tudou.com), 47.246.137.48 (mx2.tudou.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 tudou.com ›