Subject: Re: bug#45925: 27.1; *Summary* buffer vs. raw utf-8 headers

From: Eli Zaretskii <[email-masked]>
Date: Thu, 21 Jan 2021 22:22:56 +0200

> From: 積丹尼 Dan Jacobson
>  <[email-masked]>
> Date: Fri, 22 Jan 2021 03:55:44 +0800
> Cc: [email-masked]
> 
> Here you will see a mix of raw UTF-8, raw big5, all in the same file.
> The raw big5 works fine, but the raw UTF-8 looks garbled, in the summary
> buffer. In the article buffer, all look fine.

Why do you expect a mixed-encoding stuff to work in Emacs?  Emacs only
supports a single encoding of any chunk of text it gets, be it a file
or an email message.

Files such as this one are simply not supported.