Is this email
legitimate?
SecureStamp verifies senders in real-time: SPF, DKIM, DMARC and domain reputation. The plugin shows the status directly in your email client, without changing the way you work.
Real-time verification
How it works
Simple for the user. Robust underneath.
Install the plugin
Chrome extension for Gmail or Add-in for Outlook. Once installed, it works in the background without interruptions.
Plugin verifies
When you open an email, the plugin queries the backend with the sender's cryptographic token. It doesn't trust images or what the email says.
You see the status
A color indicator (green / amber / red) or a new column in your inbox tells you whether the sender is trusted, suspicious, or blocked.
The stamp and the status
The stamp is art. The plugin is what verifies.
Stamp
It's a domain's visual certification. An artistic, collectible element that proves a company registered its identity with SecureStamp. If someone copies the stamp image, it's just a drawing — without the cryptographic token it has no validity.
Status indicator
The color the plugin shows in your email client. Green = verified, Amber = suspicious, Red = blocked. This IS verified in real-time against the backend — it cannot be faked with an image.
Plugin = the arbiter
The plugin is what connects to the backend and decides the status. No matter what image the email has — the plugin checks the token and the backend responds with the domain's real status.
Trust states
Three clear states
billing@acmecorp.com
Domain verified with SPF, DKIM and DMARC in order.
billing@acme-corp-urgent.com
New domain. SPF configured, DMARC absent.
noreply@microsoft-security.top
Possible typosquatting. Does not exist in DNS.
Pricing
Start free. Scale when you need to.
Free
For individuals and proof of concept
- 100 verifications / month
- Gmail + Outlook plugin
- Basic dashboard
- Public API (rate-limited)
Starter
For small teams
- 5,000 verifications / month
- Customizable stamp
- 1 verified domain
- Email alerts
- Email support
Business
For high-volume companies
- Unlimited verifications
- Artist stamps (collectibles)
- 5 verified domains
- Real-time alerts + webhook
- Advanced dashboard
- Priority support