Nullbox

Hey everyone, I’m Stephan, the developer behind Nullbox 👋 I built Nullbox because most email aliasing tools are effectively blind forwarders. Once an address leaks, everything still hits your inbox unless you manually clean it up. Nullbox treats inbound email as a decision problem. Every message is explicitly forwarded, quarantined, or dropped based on clear rules. New aliases start in a learning mode to establish trusted senders, then lock down to only those senders over time. From a privacy perspective, the system is designed to avoid touching email content unless necessary. Unless a message is quarantined, decisions are made using metadata only. Even quarantined messages aren’t inspected. They’re stored so you can review them, then removed. Happy to answer questions, especially around tradeoffs, limitations, or how this compares to existing aliasing tools.