Hopefully, the wallet can function without these features enabled.
Sending to email sounds like a great feature! As much as I hate email and love NOSTR, reality is email is still the prominent way to get in touch with people.
They can probably support all email address, but require users to create a Free proton account to claim their bitcoin.
Yes it says both users must have Proton Wallet (not a paid plan though) to use the email feature. It also says they pre-generate a list of receive addresses, signed by a gpg key and uploaded to the server.
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