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Hi Papo,

> Am I correct in saying that I cannot save a pending message as an encrypted
> one unless the "From" field has an Identity with a user that has been
> configured already to use Enigmail OpenPGP support?

due to the nature of asymmetric encryption you need the receipient's key to
ENCRYPT your message. Are you trying to encrypt or sign your draft?

Enigmail can save drafts encrypted or unencrypted. If you need to encrypt your
draft, then you should give Enigmail a chance to use proper keys to encrypt to:
those of your receipients AND yours (encrypt-to-self). So you need to set both
FROM *and* TO/CC/BCC addresses prior to saving.

If you use/select a TB identity that has OpenPGP enabled but there is no key in
your GnuPG keyring that matches your identity's email address, you get an error
dialog telling you to select an identity in your OpenPGP preferences. You should
be able to du just that even without an Email address set in your identity. As
long as you manually set an associated key, that one will be used to encrypt-
to-self.

> I ask because I  thought I should be able to encrypt without signing for
> any recipient regardless of the sender's ID, but that appears not to be
> the case.

No, it's not independent of the sender as explained above.

> After all, encryption is based on the recipient, not on the sender.

Yes. But you are a receipient aswell. Otherwise you would not be able to read
your sent messages ...

> So, apparently I cannot have an on-the-fly "From" header for a message and
>  save it, even temporarily, as encrypted, although it would also seem to me
>  that this might be allowed if my configuration options included encrypting
>  to self.

Disabling encrypt-to-self could enable you to do it but it is not-at-all a
function that many people would need and Patrick focusses on those.

Did that help you?
Olav
- --
The Enigmail Project - OpenPGP Email Security For Mozilla Applications
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