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Sender Registry is a business email intelligence network. Forward a suspicious email and get a real, evidence-based assessment back. Free, in minutes. Search the registry for a sender, domain, or campaign. Verify an important request before your business acts on it.

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EMAIL ASSESSMENT SR-748213
CRITICAL: Block this sender immediately
RISK
92/100
CONFIDENCE
88%
NETWORK
CORROBORATED
hmrc-refunds-gateway.com impersonates a tax-refund notice. Seen in 7 reports across 5 independent organisations in the last 11 days.
rightmove-portal-secure.com
rightmove-portal-secure.com
HIGH
Domain · 3 reports
leads@rightmove-...secure.com
HIGH
Sender · 9 days ago
Rightmove R2 campaign
NEW
Campaign · EMERGING

Ask the network: has anyone seen this?

Search a sender, domain, subject line, or campaign. Sender Registry checks the network's own report history, related campaigns, risk history, and connected infrastructure. It shows its full record, not just a single verdict.

A sender that's never been seen before is not automatically marked safe. Human beings have already invented enough ways to abuse a green tick.

Payment diversion

Verify before your business acts.

Changed bank details. An "urgent" payment request. A supposed supplier instruction. Sender Registry runs a focused check for supplier impersonation, lookalike domains, unusual sender relationships, and campaign history. All before money moves, not after.

VERIFY BEFORE YOU ACT
Changed bank details detected. This request doesn't match your supplier's known domain.
Claims to beAshcombe & Reeve Supplies
Genuine supplier domainashcombe-reeve.co.uk
Sending domainashcombe-reeve-accounts.com
Domain similarity91% lookalike match
Recommended: verify by phone using a number from a previous invoice. Never one supplied in this message.

Try it yourself.

Search a domain below and see the kind of record Sender Registry keeps. A live example, not your own data.

Type or pick a domain below…

Beyond one email. Understand the operation.

A single suspicious email may look isolated. Across a network, it's often the first visible part of a much larger campaign.

BUSINESS WATCH
Supplier Watch · 6 domains Active
Executive Watch · 4 people Active
Brand Watch · impersonation found 1 match
Lookalike Radar · 9 domains watched Active

Recurring monitoring, not a one-off check.

Supplier Watch monitors important supplier domains and identities. Executive Watch looks for external emails impersonating your directors and finance staff. Brand Watch tells you when the network sees attacks impersonating your own company. Domain Lookalike Radar watches for confusingly similar domains, before anyone's been phished with them.

My Exposure shows campaigns and threats connected to your organisation specifically. Not generic threat news. Threats Like Yours highlights activity being reported by similar businesses right now.

Watch an attack unfold, then see the whole family.

CAMPAIGN REPLAY
18 days ago
First seen: Manchester
12 days ago
Second organisation reports it
6 days ago
Report pace increases sharply
Yesterday
Reaches London; Retail added as a target
THREAT DNA

99% fingerprint match to a separately-named campaign. Same infrastructure, same templates, different domain.

MONDAY MORNING BRIEFING

While you were away, 3 campaigns relevant to your business emerged.

· A payment-diversion campaign targeting Property, now ELEVATED
· Your Executive Watch caught an impersonation attempt
· Staff reported 6 suspicious emails; 2 confirmed threats
DEVELOPER / API
GET /api/v1/campaigns?industry=property
→ 3 active campaigns, 1 ELEVATED
sk_live_••••4f2a 1,204 calls · 30d
Retrospective intelligence

The network keeps working after you've stopped looking.

An assessment isn't a one-time verdict. If the network later resolves what an earlier email really was, Sender Registry reaches back and tells you.

09:12 · FIRST ASSESSED
LIMITED INTELLIGENCE

Not enough network evidence yet to be certain either way. Not the same as "safe."

17 minutes later
09:29 · RESOLVED
CRITICAL: campaign confirmed

Two other organisations independently reported the same sender. Your earlier assessment is linked, and you're alerted automatically.

What Sender Registry investigates.

Every forwarded email is broken down into real evidence, not a black-box score.

See the full capability tour →
Sender identity
Authentication (SPF/DKIM/DMARC)
Domains
URLs and redirect chains
QR code destinations
Attachments
Campaign relationships
Network report history
Supplier relationships
Message templates

Built on evidence, not a verdict you have to trust blindly.

Risk, Confidence, Network Confirmation: always separate

Never collapsed into one traffic-light score. You see how dangerous something looks, how certain we are, and how much of the network has corroborated it. Three different questions.

"Not previously seen" is never "safe"

An absence of network history means the network hasn't built enough intelligence yet. Not that something has been cleared. We say so explicitly, every time.

Every claim shows its working

Timestamps, first seen, last seen, evidence freshness, and a plain-English reason for every contribution to a score. Expandable, never hidden behind the number.

Read our full methodology & dispute process

Start free. Upgrade when you need the network.

No hidden tiers, no "contact sales" wall on the basics.

Free

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Free
  • Forward suspicious emails for a free assessment
  • Risk, Confidence & Recommended Action
  • Block This Sender instructions
  • 1 seat
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Observed

For a small business ready to search the network.

£19 /month
  • Everything in Free
  • Registry Search & full Registry Records
  • Campaigns, Replay, Threat DNA, Intelligence Map
  • Report history & generic Watch
  • 3 seats
Start with Observed
Most popular

Corroborated

For a growing business that wants to get ahead of threats.

£45 /month
  • Everything in Observed
  • Business Watch: Supplier, Executive, Brand, Lookalike
  • My Exposure & Threats Like Yours
  • Briefings, Board & Insurance Reports
  • 10 seats
Start with Corroborated

Verified

For MSPs and teams who need to integrate.

£99 /month
  • Everything in Corroborated
  • Threat API & webhooks
  • Higher rate limits
  • Priority support
  • 25 seats
Start with Verified

Tier names and prices are an early proposal and may change before launch.

Compare plans Free Observed Corroborated Verified
Forward & assess emails
Registry Search & Records
Campaigns, Replay, Threat DNA, Intelligence Map
Business Watch (Supplier/Executive/Brand/Lookalike)
My Exposure & Threats Like Yours
Briefings, Board & Insurance Reports
Threat API & webhooks
Seats included 1 3 10 25

What to look out for.

Five signals worth checking for in any message that feels slightly off.

1

A claimed authority

Does the message claim to be your bank, a supplier, a government department, or someone senior in your own organisation?

2

Manufactured urgency

Are you being told to act "within 24 hours" or "immediately", or threatened with a consequence if you don’t?

3

An emotional pull

Does it make you anxious, hopeful, or curious enough to act before thinking it through?

4

Scarcity or an unusually good offer

Is it dangling something in short supply, or a deal that seems too good to check first?

5

A hook into current events

Does it reference something genuinely in the news, or a predictable seasonal moment such as a tax deadline, to seem timely and relevant?

Before you act: verify using a contact method you already know and trust, such as a number from a previous invoice, or the organisation's own website. Never a number or link provided in the suspicious message itself.

Read the full guidance →

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