Type your domain and get a free A to F grade for how well it is protected against being impersonated in email. We read only public DNS records (SPF, DKIM, DMARC and more), never your systems. No account needed.
Create a free account to see this grade in your dashboard and forward suspicious emails for a network-backed assessment. Upgrade any time to keep this domain monitored, be alerted when its grade slips, and grade your suppliers too.
For developers
Screen disposable emails, Tor IPs, risky domains and known-bad senders programmatically, in one API call. Free to start.
You can change this at any time.
Every object in the registry (a sender, a domain, a campaign) moves through five stages as independent evidence builds:
This is deliberately separate from Risk and Confidence. How much of the network agrees is a different question from how dangerous something looks, or how certain we are.
Every campaign gets scored across 8 axes: infrastructure, domain patterns, message templates, link behaviour, attachment patterns, target industries, target roles, and campaign velocity. All plotted as a fingerprint.
Sender Registry compares every campaign's fingerprint against every other campaign's using cosine similarity: the same technique used to compare documents by meaning, not just matching words. A high match (we only ever suggest one above 55% similarity) means two campaigns that look unrelated on the surface may share real infrastructure, even under completely different domain names.
Senders, domains, URLs, attachments, campaigns, brands and suppliers all become nodes in a shared relationship graph, built from real evidence: a sender using a domain, a domain appearing in the same report as another domain, a report belonging to a campaign.
On a phone, we deliberately don't force a giant graph onto a small screen. Instead you get a focused view: the object you're looking at, and everything directly connected to it, with a tap to move to any of those connections in turn.
Add Sender Registry to your home screen and turn on notifications from your account - both free, both take under a minute. From then on, anything urgent (a payment-diversion campaign, an executive impersonation attempt) reaches you as a real notification on your lock screen, the same way any other app alerts you.
Every notification is sent end-to-end encrypted directly to your device - nothing is readable in transit by anyone other than your phone.
Open Verify Before You Act, point your camera at a QR code, and capture it. The image is decoded and the destination it leads to is checked exactly the same way we already check a QR code found inside a forwarded email - the same detection, just with your camera as the front door.
You'll see whether the destination is safe, blocked, or worth a second look, with a plain explanation either way.
On Android, once the app is added to your home screen, "Sender Registry" simply appears as an option in your phone's normal Share menu - the same one you'd use to send a photo to a friend. Share a suspicious text or link straight in, review it, and submit.
On iPhone, Apple's own software doesn't allow a website to appear in the Share menu automatically. A short, one-time setup (a free "Shortcut") gets you the same result - after that one step, it behaves identically on both phones.
Sender Registry