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studytube.nl

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

Domain & DNS

error

27 passed 0 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration iDelegation ✓Nameservers ✓SOA ✓DNSSEC iRecords

Recent checks

!

Full report

Domain & DNS report for studytube.nl ›

Mail

fail

25 passed 6 warn 1 failed

Areas

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

Problems

  • ✗
    DMARC not strict enough for BIMI
    BIMI · Mail clients will not show the logo. BIMI requires a subdomain policy other than sp=none.
    #39
  • !
    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
  • !
    Subdomains unprotected (sp=none)
    DMARC · DMARC subdomain policy is sp=none, so spoofed mail from subdomains is not blocked. Consider sp=quarantine or sp=reject.
    #20
  • !
    Signatures expire in 10h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-23T02:00:00Z (in 10h0m0s). Check that re-signing works.
    #21
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), email (1024 bits), k1 (1024 bits), 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
  • !
    No certificate (a=)
    BIMI · The logo is published without a Verified Mark Certificate. Gmail and Apple Mail only show BIMI logos with a VMC or CMC; Yahoo shows it without one.
    #38

Recent checks

✗

Full report

Mail report for studytube.nl ›