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Re: Subject of PGP-encrypted emails

From: Lars Ingebrigtsen
Subject: Re: Subject of PGP-encrypted emails
Date: Wed, 04 Aug 2021 09:11:03 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

Adam Sjøgren <> writes:

> I noticed that instead of including an unencrypted Subject:-header, it
> is replaced by "Subject: ..." and then 'filled in' when the message is
> decrypted.

Hm...  I guess it would be possible to update the Summary buffer, too,
but it'd be pretty awkward -- do we want to redo the threading, for

> I wonder if anyone has looked into adapting Gnus to do something similar?
> Or maybe just do the same extraction and 'filling in' of the Subject:
> when reading an encrypted email sent from Thunderbird.
> It looks like what Thunderbird does it that it generates an
> encrypted.asc which decrypts to a MIME message, which has a part that
> includes the Subject:-header:
>   Content-Type: multipart/mixed; boundary="80MRq3onMnRYcWyMqpzN3xR7VKumL3WsW";
>    protected-headers="v1"
>   Subject: Dette er emnelinien
>   From: Test Testersen <>
>   To: =?UTF-8?Q?Adam_Sj=c3=b8gren?= <>
>   Message-ID: <>
> So the display-part is perhaps easier than the sending part.

We could update the headers in the Article buffer easily enough, but on
the other hand -- if the user wants to respond to this in clear text,
hitting `C-d' first is easy enough, and ... do we want to encourage
responding to encrypted stuff in clear text?  (I mean, if we just
rewrite the Article buffer Subject/From/etc headers, then hitting `r'
will use those, and then we might reveal...  stuff...)

> I also noticed that Thunderbird included an Autocrypt:-header, which
> seems to include the public key of the sender - I haven't looked into
> it, but it might be worth adding support for that in Gnus as well? Or
> maybe it's a waste of bandwidth...

What does the Autocrypt header do?

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