blacklist_check

shallow

net.fmelo/cognita · Verify this server

Check whether a mail server is listed on common email DNS blocklists (DNSBLs). For a domain, its mail (MX) IPs are checked — what matters for email reputation — falling back to the A record when there is no MX; a literal IP is checked directly. Read-only DNS queries.

100.0/100

1 trials · measured 2 days ago

blacklist_check scores 100.0/100 on Vouch's measured behaviour index, from 1 real invocation trials against net.fmelo/cognita, measured 20 Oct 2026 under methodology v0.2.0. Every measured component scored 100.

Component breakdown

ComponentWeightValue
Reliability35%not applicable
Schema integrity25%100.0
Failure behaviour15%not applicable
Latency15%not applicable
Concurrency10%not applicable

Tool details

Transport
remote
Credential class
self-provisionable
Input schema
not declared
Output schema
not declared
Side-effect classification
unclassified

Score history

DayScoreTierMethodology
2026-10-20100.0shallowv0.2.0

Probe evidence

ProbeOutcomes
schema_integritypass: 1

Raw request/response logs are not archived yet — the outcome counts above are drawn directly from every recorded trial.

Embed this score

Available for every tool, scored or not — not a verification perk. Always links back to this page.

Vouch score: blacklist_check
[![Vouch score](https://vouch.tools/api/tools/4d61a86c-a070-40da-9a2c-91d5457fde58/badge.svg)](https://vouch.tools/tools/4d61a86c-a070-40da-9a2c-91d5457fde58)