Encryption: mapping between recipient and key
How can I tell thunderbird to use public key XXXfoo for email recipient address YYYbar?
With thunderbird 78 it's not possible to encrypt the email for a certain recipient with his public key. The public key is visible in the KeyManager. It is verified. But the recipient's address does not occur in the name of the key. Maybe this is the reason for the problem, that thunderbird 78 tells me, that there is no key available to encrypt the mail with. With enigmail, I could define a mapping gnupg key <--> recipient address. I didn't find an equivalent for that in thunderbird 78.
פתרון נבחר
The closest to Enigmail per-recipient rules in TB78 is the alias functionality. https://wiki.mozilla.org/Thunderbird:OpenPGP:Aliases
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Enigmail has per-recipient rule editor. This is missing in Thunderbird78.
The per-recipient rule editor displays my entire gnupg key ring. I can associate any of these keys with an email address.
This feature is essential. And I don't find it in Thunderbird78.
פתרון נבחר
The closest to Enigmail per-recipient rules in TB78 is the alias functionality. https://wiki.mozilla.org/Thunderbird:OpenPGP:Aliases
Works for me! Thanks a lot!