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sron.nl

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

Domain & DNS

error

29 passed 0 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration ✓Delegation iNameservers ✓SOA ✓DNSSEC iRecords

Recent checks

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Full report

Domain & DNS report for sron.nl ›

Mail

warn

28 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
  • !
    Report address not authorized
    DMARC · These report addresses are in another domain that has not agreed to receive your reports, so receivers will not send them: mailto:dmarc-rua@sron365.onmicrosoft.com (needs sron.nl._report._dmarc.sron365.onmicrosoft.com); mailto:dmarc-ruf@sron365.onmicrosoft.com (needs sron.nl._report._dmarc.sron365.onmicrosoft.com). Ask the report provider to publish the record, or check the address.
    #29
  • !
    Reverse DNS does not match
    MX · The PTR name of these addresses does not resolve back to the same address: 2001:610:1a08:229:30::110 -> mailscanner2.sron.nl.
    #30
  • !
    Policy in testing mode
    TLS · With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean.
    #33
  • !
    Not configured
    TLS · MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".
    #35

Recent checks

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Mail report for sron.nl ›