How does Vivaldi webmail compare to other popular email providers?

DoctorG

@far4 Do you know a webmail software which can create/use different OpenPGP keys for signing and encryption?

far4

@DoctorG
That's a good question!
Unfortunately, I know very little about webmail - for that matter. I haven't heard of it. May be Anonaddy? Protonmail?

Android/OpenKeychain itself knows how to do this. But the associated FairEMail doesn't work properly. Or I don't know how to set it up properly. Anyway, I came across this point yesterday and was interested.
So far I don't know, haven't seen, haven't heard of any email client (on android) that works these things correctly. Might try k9mail, if it hasn't turned into a pumpkin yet.... i.e. thunderbird. There used to be OKC interoperability features there.

I wonder if Vivaldi's desktop mail client can't work correctly with pgp in this case either? I don't have a computer, I can't check, unfortunately.

DoctorG

@far4 said in How does Vivaldi webmail compare to other popular email providers?:

I wonder if Vivaldi's desktop mail client can't work correctly with pgp in this case either?

OpenPGP in Vivaldi's desktop mail client is planned, but not not implemented yet.
As less users run OpenPGP the priority to add this in near future is not high.

Pathduck

@far4 said in How does Vivaldi webmail compare to other popular email providers?:

Just read up on the features of pgp, it can do this.

It's been two decades since I last used PGP, but I did a quick search how it does this.

When I receive this message on my gmail, I can decrypt it with any of the three private keys. Any and one key.

That's because when you send a message to several receivers, it encrypts the message itself with a symmetric key (the same for all) then encrypts this key in the header of the document with the pubkey of the recipient.
https://www.quora.com/How-does-PGP-manage-to-encrypt-a-message-for-two-different-people
https://superuser.com/questions/554513/pgp-encrypt-single-message-for-multiple-recipients
https://security.stackexchange.com/questions/8245/gpg-file-size-with-multiple-recipients

If the message itself was encrypted with all pubkeys of all the recipients, it could not be opened by anyone. Only each header for each recipient is encrypted with the pubkey.