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ups.com

Checked 2026-10-22 11:16 UTC · first added 2026-10-21
✗Problems found Score 69 of 100

Domain & DNS

fail

28 passed 3 warn 1 failed

Areas

iRegistration !Delegation ✗Nameservers ✓SOA !DNSSEC ✓Records

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: cbru.br.ns.els-gms.att.net (2001:1890:1ff:9f0:68:94:156:132): read tcp [2a01:4f8:1c1c:eebf::1]:56358->[2001:1890:1ff:9f0:68:94:156:132]:53: read: connection reset by peer; cmtu.mt.ns.els-gms.att.net (2001:1890:1ff:9f1:99:99:99:132): read tcp [2a01:4f8:1c1c:eebf::1]:52754->[2001:1890:1ff:9f1:99:99:99:132]:53: read: connection reset by peer.
    #19
  • !
    Glue differs from the zone
    Delegation · The addresses at the parent (glue) differ from the addresses in the zone: auth2.dns.cogentco.com (glue 66.28.0.30, zone 66.28.0.30, 2001:550:1:b::d). Update the glue at your registrar.
    #8
  • !
    Signatures expire soon
    DNSSEC · The earliest signature expires at 2026-10-27 21:12 UTC (in 130h0m0s). Check that automatic re-signing works.
    #30
  • !
    NSEC3 with extra iterations or salt
    DNSSEC · NSEC3 uses 10 iterations and a 7-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Recent checks

✗

Full report

Domain & DNS report for ups.com ›

Mail

warn

28 passed 4 warn 0 failed

Areas

✓SPF ✓DMARC !DKIM !DNSSEC !MX !TLS ✓BIMI

Problems

  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: mxa-002b8001.gslb.pphosted.com, mxb-002b8001.gslb.pphosted.com
    #11
  • !
    Signatures expire in 130h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-27T21:12:07Z (in 130h0m0s). Check that re-signing works.
    #21
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: k1 (1024 bits), selector1 (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    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 ups.com ›