Conservative in what it sends.
Liberal in what it accepts.
Postel is a fast, native Gmail client for macOS. Your mail stays between you and Gmail — tracking pixels blocked, scripts never run, no servers reading your inbox.
In development · coming to macOS 14+ · signup below for one email at launch
Gmail, at home on the Mac
Postel Mail talks directly to Gmail’s own API, so your mailbox behaves exactly as Gmail means it to. Conversations are threads, the way Gmail threads them. Search is Gmail search, with the operators you already use. Labels, Move To, and the Primary / Social / Promotions categories match the web interface instead of fighting it — and archiving is instant, with a five-second Undo.
Around that, a real Mac app: a compact three-pane window, native toolbar and search, drafts that save to Gmail as you type and survive a crash, replies and new messages in a proper compose window, and attachments you can save with a click.
What it won’t do
The name is a promise — Jon Postel’s robustness principle, applied to your mail. Postel Mail never retries an ambiguous send, so you never send the same message twice. Remote images and tracking pixels stay blocked until you ask, so senders learn nothing about when or where you read. Malformed mail still renders instead of erroring. And nothing you read or write ever touches a BNFY server — your mail stays between your Mac and Gmail.
The full policy, in plain language: privacy.