Hi,

Thanks for the bug report!

>   From: =?UTF-8?Q?Ludovic_Court=E8s?= <ludo@gnu.org>

This MIME encoded word is incorrectly encoded. UTF-8 is declared as the
encoding, while actually ISO-8859-1 has been used.

> I'm still not exactly sure why, some experimenting shows that the
> following decodes to what I guess is the intended text:
>
>   Ludovic_Court=C3=A8s

Yes, this is the correct encoding.

> Similarly to the recent changes, specifying 'substitute as the third
> argument to bytevector->string at least avoids crashing in this case.

Indeed, the substitute conversion strategy is the only correct way to
proceed. I've made this change and pushed to master.

https://git.systemreboot.net/guile-email/commit/?id=9d82904011516530b6ef1bcd53cef220db485e7a

I'm ok with having another bugfix release, but I think we should wait a
week or two in case more bugs are found. WDYT?

Regards,
Arun.