Phase 1 · Reputation Monitoring is liveNew
Trusted by 3,400+ senders
1,247scanning right now

Know the moment your sender goes

SenderSignal continuously watches 150+ blacklists, complaint loops, and reputation feeds. The instant your domain or sending IP is listed, we tell you, usually 20+ minutes before it breaks your next campaign.

No card required 2-min setup SOC 2 Type II GDPR ready
DETECTEDHIGH
8.3s
P50 detection latency
ROUTED47ms
+12
5 channels delivered
ALL CLEAR
150 / 150
sources clean · 38s ago
Live · Just now
mail.yourcompany.comLast checked · 38s ago
Reputation
0/100↑ 4 · 7d
8090
29 DAYS AGO
91/100
30d ago21d14d7dtoday
Spamhaus ZENCLEAN
BarracudaCLEAN
InvaluementCLEAN
SURBLCLEAN
URIBLCLEAN
SORBSCLEAN
Scroll to explore
0+domains monitored
0kchecks per minute
0+blacklist sources
0edge regions
0.99%uptime SLA
Trusted by ESP, e-commerce, SaaS, and agency teams worldwide
LUMENFLINTCONORTHWINDHELIOSKONTRAORBITALRAVENNOMADCIRRUSPIVOTGUILD STUDIOSAPEX·IOLUMENFLINTCONORTHWINDHELIOSKONTRAORBITALRAVENNOMADCIRRUSPIVOTGUILD STUDIOSAPEX·IO
Live · happening across our edge right now847k checks / min
14:02:08mail.acme.coSpamhaus SBLLISTED
14:02:14sender.flintco.ioURIBLCLEAN
14:02:21mta.lumen.appBarracudaCLEAN
14:02:29support.northwind.ioReputationIMPROVED
14:02:36outreach.helios.netSORBSCLEAN
14:02:42campaign.guild.studioInvaluementDELISTED
14:02:48transactional.raven.coSURBLCLEAN
14:02:55newsletter.kontra.ioPSBLCLEAN
14:03:02mx.heliosmail.ioMX recordsCHANGED
14:03:09mail.flintco.comDMARCIMPROVED
14:03:15sender.lumen.appUCEPROTECTCLEAN
14:03:22hello.nomad.studioSpamhaus DBLCLEAN
14:02:08mail.acme.coSpamhaus SBLLISTED
14:02:14sender.flintco.ioURIBLCLEAN
14:02:21mta.lumen.appBarracudaCLEAN
14:02:29support.northwind.ioReputationIMPROVED
14:02:36outreach.helios.netSORBSCLEAN
14:02:42campaign.guild.studioInvaluementDELISTED
14:02:48transactional.raven.coSURBLCLEAN
14:02:55newsletter.kontra.ioPSBLCLEAN
14:03:02mx.heliosmail.ioMX recordsCHANGED
14:03:09mail.flintco.comDMARCIMPROVED
14:03:15sender.lumen.appUCEPROTECTCLEAN
14:03:22hello.nomad.studioSpamhaus DBLCLEAN
The problem

Day 1: clean.

Reputation 94/100. Campaigns landing in primary. Open rates healthy.

Reputation · mail.acme.co
↑ Healthy
10080604020
How it works

Incident #4297, watch it unfold.

The full operations theatre, Slack channel, live timer, reputation curve, and every channel firing in lock-step. This is the product, replaying a real listing event end-to-end.

LIVE REPLAY·INCIDENT #4297·mail.acme.co
elapsed00:00:00
nominal
reputation94/100
#incident-42973 members · pinned
Auto-replay
Tuesday
SenderSignal is typing…
+Reply to #incident-4297…BI@:)
CRISIS AVERTED
36 minutes · zero lost campaigns · zero customer tickets
8.3sdetection
5channels
150 / 150sources clean
The platform

Four primitives. One product.

Every signal your deliverability team chases, consolidated into a single, API-first surface. Hover any cell to see it come alive.

Reputation
0reputation

A score that explains itself.

A 0–100 reputation per domain & IP, fed by a model trained on billions of email events. Drill into every signal that moved the score.

  • +6 this week
  • 97% confidence
  • 90 days of history
Detection

Always-on radar.

Continuous probes across 150+ blacklists, sweeping every 60 seconds from 14 edge regions.

150+sources
14regions
60sinterval
Coverage

Beyond blacklists.

HTTP, SMTP TLS, MX, SPF, DKIM, DMARC, the entire deliverability surface in one pane.

  • HTTP / HTTPS
    200 · 89ms · cert valid 138d
  • SMTP banner
    220 mail.acme.co ESMTP
  • STARTTLS
    TLS 1.3 · CHACHA20-POLY1305
  • SPF
    v=spf1 · 8 records · pass
  • DKIM
    2048-bit key · pass · 7d rotation
  • DMARC
    p=reject · aligned · 100% coverage
Workflow

API-first by design.

Every signal queryable, every alert routable, every action automatable.

curlnodepython
$ curl https://api.sendersignal.com/v1/scan \
  -H "Authorization: Bearer $SS_KEY" \
  -d '{"domain":"mail.acme.co"}'

{
  "reputation": 94,
  "listed": false,
  "sources_clean": 150,
  "latency_ms": 47
}
p99 47ms·HMAC signed·idempotent
Built for

The same product, tuned to your role.

Pick yours.

You own the inbox rate. So we own the listings.

A single dashboard with reputation, SPF/DKIM/DMARC, MX, and uptime. Slack the second something moves. PDF reports for the all-hands.

  • Continuous monitor across 150+ sources
  • SPF/DKIM/DMARC drift alerts
  • Weekly executive PDF digest
  • API + webhooks for your own stack
Start free
mail.acme.co · Reputation
94/100↑ 4 · 7d
SPFValid
DKIM2/2 keys
DMARCp=reject
MX2 hosts
The edge

Probing every region, every minute.

Edge probes in 14 regions sweep blacklists every 60 seconds. A listing in Sydney gets caught as fast as one in Virginia. Every dot you see below is a live region tracking your domain, no polling delay, no “we'll check again tomorrow.”

0
edge regions
0k
checks per minute
SIGNALS / DAY
2,418,294
ACTIVE REGION
us-east-1
CHECKS / MIN
847
P50 LATENCY
8.3sec
The dashboard

Click around. It's the real thing.

A working preview of the SenderSignal app. Switch tabs to feel the speed.

Active
14
domains
Listings
0
all clear
Health
94%
↑ 4 · 7d
Checks
672
today
Reputation history
last 30 days
Blacklist heatmap
5 domains · 12 sources
Recent alerts
last 24h
mx.heliosmail.io · MX records changed2 min ago
mail.flintco.com · Delisted from URIBL34 min ago
sender.lumen.app · DMARC weakened1 h ago
support.northwind.io · Reputation +62 h ago
mta.kontra.io · SSL cert expiring3 h ago
Integrations

Plugs into everything your team already uses.

Slack, PagerDuty, Teams, Discord, email, SMS, webhooks. If your stack speaks JSON or HTTP, we route to it. Hover any integration to see the payload.

S
Slack
PagerDuty
Teams
Webhooks
Email
SMS
GitHub
Discord
Slack
Tap or hover any integration

Push alerts to channels with severity thresholds.

Sample payload
POST /webhook · channel #oncall
✓ HMAC-signed✓ Retries with backoff✓ Per-rule routing
The difference

Same listing. Two timelines.

The same Tuesday afternoon. The same domain. Watch what happens in 36 minutes against what happens in 6 days, both timelines, racing in parallel.

READY·mail.acme.co · Tuesday 14:02
WITHOUT SENDERSIGNAL

You find out from your customers.

duration6 days, 4 hours
Tue 14:02
Listing happens. Nobody knows.
Tue 16:30
1st customer complaint hits support
Tue 17:45
3rd complaint. Sales loops in CSM.
Wed 09:00
Marketing ships campaign. Lands in spam.
Wed 11:30
Manual blacklist hunt begins (12 sources)
Thu
File removal request. Hope for best.
Fri
Still waiting. Sales pipeline blocked.
Next week
Finally clean. $48K of revenue lost.
WITH SENDERSIGNAL

You catch it before lunch.

duration36 minutes
14:02:00
Probe sweep finds new listing
14:02:08
8 seconds. Severity tagged HIGH.
14:02:15
Slack + PagerDuty fire to #oncall
14:04
Removal form pre-filled, evidence attached
14:08
Submission sent · ticket #IV-99214
14:38
Delisted. Reputation 78 → 94.
The bar that ends the argument
Without6 days, 4 hours
$48K revenue lost·7 customer tickets
With36 minutes
$0 lost·0 tickets
≈ 250×faster from listing to clean
What teams say

Operators who measure their work in open rates.

"

We dropped three separate tools for this one. The delisting walkthroughs alone pay for it.

DO
Daniel Ortiz
Deliverability Lead
FLINTCO
Open rate
+12pp
1 / 4
0+
blacklist sources monitored
0.0s
P50 detection latency
0.00%
platform uptime SLA
0
global edge regions
Pricing

Predictable. Honest. Free to start.

Every plan includes the full monitoring engine, paid plans add scale, integrations, and white-label.

Starter
$0
For solo senders getting started
  • 5 domains
  • Daily checks
  • 40+ core sources
  • Email alerts
  • 1 HTTP monitor
Start free
Business
$149/ mo
For agencies and high-volume senders
  • 100 domains
  • Hourly checks
  • Premium sources
  • White-label reports
  • Routing rules
  • Priority support
Start trial
Enterprise
Custom
For platforms and ESPs at scale
  • Unlimited domains
  • 15-minute checks
  • White-label status page
  • SSO + SCIM
  • Dedicated CSM
  • SLA + 99.99% uptime
Talk to sales
Questions

Frequently asked.

Don't see your question? Email us.

How fast do you detect a new blacklist listing?
P50 detection latency is 8.3 seconds across our 14-region edge, meaning half of all listings are caught in under 10 seconds, and 95% within 30 seconds. We probe every monitored source every 60 seconds, rotating through them so no single source can throttle us.
Will you slow down my email sending?
No. SenderSignal only observes public reputation feeds, DNS blocklists, and DNS authentication records, we never touch your sending infrastructure or your mail. Your MTAs, ESPs, and SMTP relays are untouched.
What happens when I get listed?
Three things, immediately: (1) we fire alerts to your configured channels (Slack, PagerDuty, email, webhook), (2) we open a guided delisting walkthrough with the specific provider's removal form prefilled, (3) we keep monitoring and auto-confirm when the delisting goes through.
Do I need to install anything?
No agents, no DNS changes, no MTA configuration. You add your domain (or sending IP) in the dashboard, and we start monitoring within 60 seconds. The only optional integration is a webhook if you want to pipe alerts into your own stack.
How does pricing work for agencies?
The Business plan covers 100 domains across unlimited clients, with white-label PDF reports and a fully-branded public status page. For larger agencies (>100 domains), Enterprise gives you unlimited domains, a custom subdomain, and a dedicated CSM.
What's coming after blacklist monitoring?
Phase 2 (Q2 2026) is automated reputation warmup, provider-aware ramp schedules that adapt to your real engagement signals. Phase 3 (Q4 2026) is inbox-placement intelligence, knowing whether you land in Primary, Promotions, or Spam before you send.

The next listing won't be a surprise.

Add your domain in two minutes. Start free, no credit card, no commitment. Get notified the second your sender goes dark.

Start free Sign in
✓ No card required✓ 2-min setup✓ SOC 2 Type II✓ GDPR ready✓ Cancel any time