On Wed, Feb 28, 2024 at 07:54:34PM +0700, Yuri Khan wrote:
> On Wed, 28 Feb 2024 at 19:21, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> > > >>> Subject:
> > > >>>   =?utf-8?Q?Traduction_fran=C3=A7aise_des_manuels_d=E2=80=99Emacs,
> > > >>>   _=C3=A9tat_des_lieux.?=

[...]

> > Maybe something is wrong here, then.  I'm not an expert on this stuff;
> > does anyone know whether this Subject encoding is OK or not?
> 
> I think the operative word here is “digest”. The above encoded string
> is quoted not from the Subject header field on an individual message
> but from the body of a message that combines multiple mailing list
> messages.

Gotcha. I just missed that (now that you mention it, it's up there,
in the Subject line -- guilty as charged).

> In the ideal world, the server software producing digests will take
> each individual message, decode its subject according to the encoding
> declared, decode the body according to the Content-Type: text/plain;
> charset= header, build the digest in Unicode land, then encode to
> UTF-8 and mail that to digest subscribers.
> 
> I’m suspecting the digest formatter might not be MIME-aware with
> respect to subject encoding.

You nailed it, I think. The digestor is being naive.

Cheers
-- 
t