For SaaS & transactional senders

A spam-foldered password reset is a support ticket.

Resets, invites and receipts are part of your product. SenderSignal monitors your app domain and dedicated sending IPs across 45+ blacklist and reputation sources, checks TLS and DMARC hourly, and pipes incidents into the tooling your team already watches.

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The SaaS playbook

Treat email like any other production dependency.

Monitor the app domain and its IPs

Add the sending domain, its subdomains and every dedicated IP as assets. Domains get the full blacklist sweep across 45+ sources; IPs add PTR and forward-confirmed reverse DNS checks. Each asset carries its own 0-100 score and trend history.

Posture checks security teams ask about

Hourly validation of SPF, DKIM, DMARC, MTA-STS and BIMI, plus STARTTLS and TLS certificate expiry, SMTP reachability and MX change detection, the checklist your security-conscious buyers send you, run continuously.

Incidents in your pipeline, not ours

HMAC-SHA256-signed webhooks carry ~60 event types into whatever runs your on-call, with routing rules, cooldowns and delivery history. Email and Slack are live too; PagerDuty, Teams and Discord are rolling out.

Know that the password reset reached the inbox

Accepted is not delivered, and a password reset filed into Promotions is a support ticket with a churn risk attached. Placement tests report the real folder at Gmail, Microsoft 365, Yahoo, Zoho and AOL for the exact template you care about, and content analysis scores the delivered copy so you know whether the wording or the reputation is the problem.

Access control ops teams expect

Isolated workspaces with schema-per-tenant separation, one login across all of them, four built-in roles plus custom roles, a full audit log and concurrent-session limits.

  • Score-drop alerts the moment a listing appears, before the “resets aren't arriving” tickets do
  • Public status page from Professional: customers self-serve “is email degraded?”
  • Test-send on every alert channel so you know the webhook works before the incident
  • 30-day trial includes deliverability checks, see a full hourly cycle on your own stack
Features SaaS teams lean on

The parts of the platform doing the heavy lifting.

Feature

Inbox placement testing

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

Learn more Feature

Deliverability monitoring

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

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Alerts & integrations

Slack, email and signed webhooks, routed by your own rules.

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See it play out

The reset-email incident, handled.

From early Postmaster signal to verified fix, routed through the tooling you already run. Click any step.

signals · mail.app.example.com
Gmail spam rate0.02% → 0.19%
password reset opensdropping
blacklistsclean
Questions

SaaS questions, answered.

Can alerts feed our existing incident tooling?
Yes, HMAC-SHA256-signed webhooks are live today, alongside email and Slack, with roughly 60 event types, routing rules, cooldowns, delivery history and a test-send button. PagerDuty, Teams and Discord channels are rolling out. Verify the signature and route the payload wherever your on-call flow lives.
We monitor dedicated sending IPs, not just domains. Is that covered?
Yes, sending IPs are first-class assets with PTR and forward-confirmed reverse DNS checks plus IP-level blacklist coverage across our 45+ sources, each with its own score, history and alerts.
Our security team asks about TLS and DMARC posture. What do you check?
Hourly deliverability checks cover SMTP reachability, STARTTLS and TLS certificate expiry, MX change detection, and full parse and validation of SPF, DKIM, DMARC, MTA-STS and BIMI. A cert about to expire or a DMARC record that stops parsing raises an alert before a customer notices.
How do we give engineers access without giving them billing?
Role-based access control ships with four built-in roles plus custom roles built from a per-module permission tree, read-only monitoring for support, full alert config for ops, no billing for either. Every change lands in the audit log, and concurrent-session limits are enforced.
Can we show customers whether email is degraded?
From the Professional plan you can publish a public status page with a custom slug, logo and color, a clean, self-serve answer to “are password resets delayed?” that keeps tickets out of the queue.
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Ship product. We'll watch the mail.

Start free, add your app domain and sending IPs, and wire the first signed webhook in minutes.

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