For ESPs & high-volume platforms

One listed IP in the pool taints every send behind it.

When you send at fleet scale, a single quiet listing does damage by the hour. SenderSignal watches every IP and domain across 45+ sources, premium feeds included, at up to 15-minute resolution, and routes incidents by pool into your own tooling.

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The high-volume playbook

Fleet-scale monitoring, incident-grade plumbing.

Every IP is a first-class asset

PTR and forward-confirmed reverse DNS checks plus IP-level blacklist coverage per address, alongside your domains and subdomains. Bulk import the whole fleet, every asset gets its initial full scan immediately and its own score and history.

Premium feeds where it counts

Public zones are table stakes. Paid tiers add premium feeds like Spamhaus DQS and Validity, the sources that matter at scale, with per-plan vendor sets across 45+ blacklist and reputation sources.

Minute-level cadence on the top tiers

Recheck frequency is yours to set, with a plan floor as fast as every minute on Business and Enterprise. At millions of sends a day, a listing found inside the minute is an incident; one found tomorrow is a customer-facing outage.

Warm new IPs before you point volume at them

Adding capacity means adding IPs with no sending history, and pointing a pool's worth of volume at a cold IP is how fleets get throttled. Inbox Boost ramps each one over 28 days with real engagement and pauses itself if bounces cross 2%, so a new pool comes online already trusted.

Verify placement per pool, not per domain

A clean score tells you nothing about which folder the transactional pool is landing in. Placement tests report the real folder at Gmail, Microsoft 365, Yahoo, Zoho and AOL, so you can catch a promo pool dragging the transactional one down before it shows up in support tickets.

Route incidents by pool

Alert rules and routing send transactional-pool events to one HMAC-SHA256-signed webhook endpoint and promo-pool events to another, with cooldowns, delivery history and test-send, so your internal tooling stays the single pane of glass.

  • Multi-workspace with schema-per-tenant isolation, one workspace per product line, one login
  • RBAC with custom roles so platform, deliverability and support teams see exactly what they should
  • Audit log of every change, who muted which alert rule, and when
  • Business covers 100 domains, with extra assets à la carte as the fleet grows
Features high-volume teams lean on

The parts of the platform doing the heavy lifting.

Feature

Blacklist monitoring

45+ blacklist & reputation sources, scored 0-100 with trend history.

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Inbox Boost

Add a domain. We provision the sending server and publish your DNS.

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Inbox placement testing

See whether you land in Primary, Promotions or Spam across providers.

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The fleet view

Per-IP truth at 15-minute resolution.

Click through a demo fleet. Pool-level webhook routing means the right team hears about the right IP.

Sending IP fleetClick an IP
Pool A · transactional
clean across 45+ sources

PTR and FCrDNS aligned, clean across every DNSBL including Spamhaus DQS.

Questions

High-volume questions, answered.

What do you actually check per sending IP?
PTR and forward-confirmed reverse DNS, plus IP-level listings across our 45+ blacklist and reputation sources, including Spamhaus ZEN, Barracuda, SpamCop and SORBS, with API-based sources like Cisco Talos and IPQualityScore. Each IP carries its own 0-100 score and trend history.
Daily rechecks are useless at our volume. How fast can you go?
You set the recheck interval, and your plan sets the floor: 30 minutes on Free, 60 on Starter, 15 on Professional, and as fast as every minute on Business and Enterprise. At fleet scale that is the difference between finding a listing after millions of sends and finding it inside the minute. Manual rescans are always available on top.
Which premium data feeds are included?
Paid tiers add premium feeds such as Spamhaus DQS and Validity on top of the public zones, with per-plan vendor sets. At high volume, the paid feeds are usually where the earliest and most consequential signals show up.
Can we route incidents by IP pool into our own tooling?
Yes, HMAC-SHA256-signed webhooks are live, with roughly 60 event types, alert rules and routing, cooldowns, delivery history and test-send. Point transactional-pool events at one endpoint and promo-pool events at another. Email and Slack are live too; PagerDuty, Teams and Discord are rolling out.
We run separate teams per product line. How does access work?
Isolated workspaces with schema-per-tenant separation, one login across all of them, and RBAC with four built-in roles plus custom roles from a per-module permission tree. Every change is captured in the audit log, and concurrent-session limits are enforced.
Start free in two minutes

Put the whole fleet under watch.

Start free, bulk-import your IPs and domains, and see per-asset scores within minutes.

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