Arun Isaac <arunisaac@systemreboot.net> writes:

>>> From: ludo@gnu.org (Ludovic Courtès)
>
> On the other hand, I just realized that this is a non-standard Emacs
> message mode parens style address described at
> https://www.gnu.org/software/emacs/manual/html_node/emacs/Mail-Headers.html
> . guile-email aims to support these non-standard addresses. So, I think
> we can relax the requirement that email headers be strictly ASCII. I'll
> push a fix and let you know.

Great, thanks.

In terms of where this message came from, I'm using getmail [1] to
recieve the messages, then using the external MTA delivery config to
pass the message off to a Guile script. I was processing the messages as
strings, but I'm switching to using bytevectors. I believe this issue
happens with strings and bytevectors.

I've checked my mailserver, and the file corresponding to the sample
email provided doesn't look to have a pure ASCII from header (in the
terminal, I see a ? instead of è, so I'm not sure what's going on
there).

Also, you can find examples (included the provided sample) in this mbox
file [2].

1: http://pyropus.ca/software/getmail/
2: https://lists.gnu.org/archive/mbox/guix-commits/2019-08

Thanks,

Chris