http://xmrmaila3sy5lgg76derwg2z6splgdcrv3jskqig62hnlrg2l6liwbad.onion/blog/2025/setup-onion-email-with-thunderbird
How Onion Routing Ensures Privacy Tor uses a multi-layer encryption process, often described as onion-like, for each data packet you send. When a relay peels off one layer, it only learns where to forward the packet next, without seeing previous hops or the final destination. Because no single relay knows the entire path, it becomes extremely difficult for anyone to trace or analyze your traffic.