The email says it's a BBC producer, a Dentsu recruiter, an Oprah's Book Club curator. Proof of Sender checks whether it really is, and tells you why, in plain English.
Get early accessIn early development. No spam, no account needed yet.
The problem
AI writes a flawless, personalised pitch and puts a real person's name on it. Your spam filter waves it through because the words look clean. Enterprise email security only protects big companies. You're on your own, until you check who actually sent it.
Glossy role, your name on it. Reply-to: a throwaway domain that isn't Dentsu.
A real broadcaster's name and photo. Sent from a Gmail address. The BBC never books from Gmail.
A real group's name, borrowed. A look-alike agency domain one letter off the real firm.
How it works
Detecting "AI-written text" is a coin-flip and getting worse. Proof of Sender ignores the writing and checks the things a scammer can't fake their way around.
The sending and reply-to domain against the employer or organisation named in the email. Authentication records, real infrastructure, look-alike domains.
Is the named person, role or group membership real and verifiable, or a famous name borrowed to borrow trust?
The same sender hitting several of your addresses with the same template is a mail-merge. Real outreach doesn't do that.
A real catch
A score is never shown on its own. Here is a genuine example, in the product's voice.
Who it's for
Proof of Sender is in early development. Tell us the fakes landing in your inbox, and get access before anyone else.
Email hello@proofofsender.com