But the protocol has already been published and there’s not much changes needed (except maybe the quantum layer?). Charging a custom license would only push the others to develop a different protocol, one that might not be as private compared to Signal.
Any outlook alternative that doesn’t look pre-dotcom? I really liked the Microsoft Mail app for its simplicity and the ability to have multiple inboxes, it’s a shame it is being replaced by outlook.
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Proton Mail says that the new Outlook app for Windows is Microsoft's new data collection service (www.ghacks.net)