Reputation Monitor

48 blacklists, one score, zero surprises.

One listing on the wrong DNSBL can silently halve your deliverability. SenderSignal checks every asset against 48 blacklist and reputation sources and turns the result into a single 0-100 score your whole team understands.

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monitor · blacklists · acme.io
Zone results47/48 clean
The source catalog

Real feeds, counted honestly.

Plenty of tools advertise inflated list counts by counting dead or duplicate zones. Our catalog is 48 curated, active sources, here is the actual breakdown.

34
IP blocklists (DNSBL), Spamhaus ZEN, Barracuda, SpamCop, SORBS, PSBL, DroneBL…
9
Domain & URI lists, Spamhaus DBL, SURBL, URIBL Black/Red/Grey…
5
Dual-coverage lists checking both IPs and domains
6
Commercial reputation APIs, Google Safe Browsing, Cisco Talos, Validity, IPQualityScore, Abusix, SURBL API
Scoring engine

A score you can put on a dashboard, and defend.

The 0-100 reputation score is deterministic and explainable. Every deduction traces back to a specific listing on a specific zone, weighted by severity and resolver confidence.

  • Starts at 100, only confirmed listings deduct points
  • Weighted deductions, list weight × severity × resolver confidence
  • Signal boosts, a Google Safe Browsing hit costs 30 points; a high IPQualityScore fraud rating costs 20
  • Noise-proof, inconclusive lookups add at most a 5-point uncertainty cap
  • Trend history, score movements over time, with drop/rise alerts at your threshold
score breakdown
Check cadence

Rechecked on a schedule you choose.

Checks fire on add, on schedule and on demand. Scheduled cadence scales with plan.

TriggerWhen it runsNotes
Initial scanImmediately on adding an assetFull catalog sweep, results in minutes
Scheduled recheckPlan cadence, daily → every 15 minutesFastest cadence on the top tier
Manual re-scanAny time, one click or bulkShort cooldown between runs
Delisting confirmationAutomatic after a listing clearsCloses the loop without babysitting
Goes well with

Blacklist status is one signal of several.

Feature

Deliverability monitoring

SPF, DKIM, DMARC, MTA-STS, BIMI, TLS, MX and PTR, checked continuously.

Learn more Feature

Sender reputation

Google Postmaster reputation, spam rate and compliance in one view.

Learn more Feature

Alerts & integrations

Slack, Teams, Discord, PagerDuty, email and signed webhooks.

Learn more
Use case

High-volume senders

Watch IP fleets and domains at 15-minute resolution with paid feeds.

See the playbook Use case

E-commerce

Protect revenue-critical campaigns from silent blacklistings.

See the playbook
Questions

Blacklist monitoring, explained.

How many blacklists are checked, exactly?
48 sources: 42 classic DNS blocklists (34 IP-based, 9 domain/URI-based, 5 covering both) and 6 commercial reputation APIs, Google Safe Browsing, Cisco Talos, Validity, IPQualityScore, Abusix and the SURBL API. Which vendors run for your assets depends on your plan; premium feeds like Spamhaus DQS come with paid tiers.
How is the 0-100 reputation score calculated?
Every asset starts at 100. Only confirmed listings deduct points, weighted by the list’s importance, the severity of the listing and how much we trust the answering resolver. A Google Safe Browsing hit deducts 30 points on its own. Inconclusive lookups add at most a small uncertainty penalty, so flaky DNS never tanks your score.
When do checks actually run?
Three triggers: a full scan the moment an asset is added, scheduled rechecks on your plan’s cadence (daily on free, down to every 15 minutes on the top tier), and manual re-scans whenever you want one, with a short cooldown to protect the resolvers.
What happens when a listing is found?
The score drops, the listing appears with the exact zone and evidence, and an alert fires to your configured channels. You get a guided delisting path for the specific vendor, and monitoring confirms automatically once the delisting goes through.
Can I monitor sending IPs, not just domains?
Yes. Domains, subdomains and IPs are first-class assets. IP assets are additionally checked for PTR and forward-confirmed reverse DNS, which many receivers treat as a basic hygiene signal.
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