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From: "Roland Winkler" <winkler@gnu.org>
Subject: Re: mail splitting with mime-encoded headers
Date: Mon, 17 Jan 2022 11:54:43 -0600
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On Mon, Jan 17 2022, Adam Sjøgren wrote:
> Roland writes:
>> What is the recommended way for dealing with mime-encoded headers when
>> splitting mail?
>
> I use this:
>
>     ; Decode headers before splitting on them:
>     (setq nnmail-mail-splitting-decodes t)

Thanks, that was exactly what I was looking for.