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Permanent methodology version

Public tool methodology v1

Published on 20.08.2026. This URL permanently describes the assessment basis of stored results and is not retrospectively reinterpreted.

Binding principles

  1. Only the explicitly selected check is performed.
  2. Unknown or unreliable states are never counted as passed.
  3. DNS and HTTPS targets are normalized, validated and protected against access to private or reserved networks.
  4. Every result contains a code, checker version, timestamp, probe, duration and approved evidence.
  5. One-off checks neither change DNS zones nor perform anonymous mail transactions.

Version status

Profile
public-tools-v1
Status
current
Check profiles
6
Published
20.08.2026

Included tools

Check blocklists

Checker
1.0.0
Scope
Public DNS and IP-pinned HTTPS to the configured provider
References
Transparent provider sources and their respective terms of use
Open tool

Check DMARC

Checker
1.0.0
Scope
DNS
References
RFC 7489, RFC 9989, RFC 9990
Open tool

Check MX and DNS

Checker
3.0.0
Scope
DNS
References
RFC 1034, RFC 1035, RFC 7505
Open tool

Check MTA-STS

Checker
1.0.0
Scope
DNS and IP-pinned HTTPS on port 443
References
RFC 8461
Open tool

Check your domain

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