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upyun.com

Checked 2026-10-22 11:16 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

22 passed 1 warn 1 failed 1 errors

lookups failed for dnssec; results are incomplete

Areas

iRegistration !Delegation ✗Nameservers ✓SOA iDNSSEC iRecords

Problems

  • ✗
    No DNS over TCP
    Nameservers · DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns1.ialloc.com (118.24.109.1): dial tcp 118.24.109.1:53: connect: connection refused; ns1.ialloc.com (2402:4e00:1700:7d00:0:9285:ffec:9d26): dial tcp [2402:4e00:1700:7d00:0:9285:ffec:9d26]:53: connect: connection refused; ns2.ialloc.com (115.159.66.63): dial tcp 115.159.66.63:53: connect: connection refused; ns2.ialloc.com (2402:4e00:1409:9f00:0:991f:7f1e:1de9): dial tcp [2402:4e00:1409:9f00:0:991f:7f1e:1de9]:53: connect: connection refused.
    #19
  • !
    Glue differs from the zone
    Delegation · The addresses at the parent (glue) differ from the addresses in the zone: ns1.ialloc.com (glue 115.159.66.63, 118.24.109.1, 2402:4e00:1700:7d00:0:9285:ffec:9d26, zone 118.24.109.1, 2402:4e00:1700:7d00:0:9285:ffec:9d26); ns2.ialloc.com (glue 115.159.66.63, 118.24.109.1, 2402:4e00:1409:9f00:0:991f:7f1e:1de9, zone 115.159.66.63, 2402:4e00:1409:9f00:0:991f:7f1e:1de9). Update the glue at your registrar.
    #8

Recent checks

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Full report

Domain & DNS report for upyun.com ›

Mail

fail

21 passed 5 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: mx1.feishu.cn, mx2.feishu.cn, mx3.feishu.cn
    #11
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    Addresses without reverse DNS
    MX · These MX addresses have no PTR record, which many receivers treat as a spam signal: 122.14.229.0 (mx2.feishu.cn), 122.14.229.0 (mx3.feishu.cn). 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 upyun.com ›