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tenable.com

Checked 2026-10-22 11:01 UTC · first added 2026-10-21
!Passed with warnings Score 88 of 100

Domain & DNS

warn

30 passed 1 warn 0 failed

Areas

iRegistration !Delegation iNameservers ✓SOA iDNSSEC ✓Records

Problems

  • !
    No IPv6
    Delegation · None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Recent checks

!

Full report

Domain & DNS report for tenable.com ›

Mail

warn

26 passed 3 warn 0 failed

Areas

iSPF ✓DMARC !DKIM ✓DNSSEC !MX !TLS iBIMI

Problems

  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: us-smtp-inbound-1.mimecast.com, us-smtp-inbound-2.mimecast.com
    #11
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: dkim (1024 bits), s2 (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

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Full report

Mail report for tenable.com ›