Why a filter in front of the inbox

The mail arrives, all of it

Farida opens her mailbox on Monday morning: thirty-eight messages. Twelve matter. The other twenty-six are follow-ups from suppliers she never contacted, two fake invoices, and an urgent payment request signed with Camille's name: who asked for nothing.

This is not about volume. It is about attention: sort long enough and you start clicking fast, which is exactly what the fake invoice is waiting for.

What the Bouclier does

The Bouclier sits before the inbox. It looks at every incoming message and asks three simple questions: is the sender really who they claim to be? Does this message look like what thousands of other servers report as unwanted? Does it carry a dangerous file?

Depending on the answer, it lets through or sets aside. Farida's twenty-six messages are no longer in her inbox: they are in her quarantine, where she can look at them whenever she likes: or never.