Mail is archived in the same format that it is sent. I don't think you
can change that. But if you always want UTF-8 charset and 8bit content
transfer encoding I think these will do it:


(setq
 mm-body-charset-encoding-alist '((utf-8 . 8bit))
 mm-coding-system-priorities '(utf-8))

(add-to-list 'mm-content-transfer-encoding-defaults '("text/.*" 8bit))

-- 
/// Teemu Likonen   - .-..   <https://github.com/tlikonen> //
// PGP: 4E10 55DC 84E9 DFF6 13D7 8557 719D 69D3 2453 9450 ///