SurfaceMap › p › presonus.com

presonus.com

Checked 2026-10-22 10:21 UTC · first added 2026-10-21
✗Problems found Score 53 of 100

Domain & DNS

fail

22 passed 4 warn 2 failed

Areas

iRegistration !Delegation ✗Nameservers ✓SOA !DNSSEC !Records

Problems

  • ✗
    Lame delegation
    Nameservers · These nameservers don't answer authoritatively for the zone, so resolvers ignore them: ns-521.awsdns-01.net (205.251.194.9): REFUSED, authoritative=false; ns-521.awsdns-01.net (2600:9000:5302:900::1): REFUSED, authoritative=false.
    #15
  • ✗
    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: ns-521.awsdns-01.net (205.251.194.9): ; ns-521.awsdns-01.net (2600:9000:5302:900::1): .
    #19
  • !
    NS sets differ
    Delegation · The nameservers at the parent and in the zone should be the same. Only at the parent: ns-521.awsdns-01.net. ns-1459.awsdns-54.org, ns-1547.awsdns-01.co.uk, ns-194.awsdns-24.com, ns-839.awsdns-40.net report NS ns-1459.awsdns-54.org ns-1547.awsdns-01.co.uk ns-194.awsdns-24.com ns-839.awsdns-40.net.
    #7
  • !
    No EDNS
    Nameservers · These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: ns-521.awsdns-01.net (205.251.194.9), ns-521.awsdns-01.net (2600:9000:5302:900::1).
    #20
  • !
    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
  • !
    Very low TTLs
    Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change.
    #32

Recent checks

✗

Full report

Domain & DNS report for presonus.com ›

Mail

warn

24 passed 5 warn 0 failed

Areas

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

Problems

  • !
    Policy: quarantine
    DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.
    #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: 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: google (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 presonus.com ›