unable to decrypt a mail coming from apple mail

[Stephan Beck]

Hi,

ng0:
> Hi,
> 
> I've just got an email where the X-Mailer is Apple Mail. It adds some
> bits and pieces, is a 7bit Content-Transfer-Encoding and I fail to
> decrypt it with gpg --decrypt (applied to the email as a file and also
> when applied to the BEGIN/END PGP block).
> The key is imported, still valid and yet I get:
> gpg: decryption failed: No secret key
> 
> I'm running an unaltered Guix build here:
> ng0 at shadowwalker ~$ gpg --version
> gpg (GnuPG) 2.1.13
> libgcrypt 1.7.3

have you checked the bug tracker at (1) ?
There are several entries for
gpg: decryption failed: No secret key.

when you enter this very phrase into the search entry mask.

Maybe there you'll find what you are looking for.

Cheers

Stephan

(1) https://bugs.gnupg.org