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"Georg C. F. Greve" <greve@gnu.org> writes:

> When the same person sends me an encrypted mail, I get a
>
>      [[PGP Encrypted Part:OK, Signer: From unknown user]]
>
> which seems a weird result, as the signer is the same person who
> encrypted the mail. The way the message is crafted, I would expect the
> email address or real name of the person who signed that mail / some
> hint about whether the signature was okay. 

What is the output from a mouse-2 click on the PGP button?

> "From unknown user" seems strange as it seems to say the signature is
> okay, but it doesn't know who signed it. But if Gnus didn't know who
> signed it, how did it know which key to check the signature against? :)

GnuPG selects the key, Gnus only parses the output from gpg.
Presumably, it is the parsing that fails here.