is the mailing list mangling email character-encoding

[Tim]

Below I've just pasted a bit of an email:
> On Sun, 2019-09-22 at 06:13 +0200, Fr??d??ric wrote:

It's from my reply to a message.  That mangled name is supposed to be
"Frederic" with acute accents above both letter "e"s.  It was when I
wrote it, and my mail client *CORRECTLY* sent it as UTF-8, but
somewhere between then and my receiving it back, the message content
has been scrambled by some broken email software that stuffed the
character encoding up.