Encoding problem with WebObs mails

[PBoissier]

The server that hosts our WebObs is configured with the following locales:

LANG=fr_FR
LANGUAGE=
LC_CTYPE="fr_FR"
LC_NUMERIC="fr_FR"
LC_TIME="fr_FR"
LC_COLLATE="fr_FR"
LC_MONETARY="fr_FR"
LC_MESSAGES="fr_FR"
LC_PAPER="fr_FR"
LC_NAME="fr_FR"
LC_ADDRESS="fr_FR"
LC_TELEPHONE="fr_FR"
LC_MEASUREMENT="fr_FR"
LC_IDENTIFICATION="fr_FR"
LC_ALL=

When sending emails, accented characters are displayed incorrectly. After discussion with François, it turns out that "The rule in webobs is: all files are in ISO8859, and the display (including forms) is in UTF8".

I tried to modify the options of mutt in WEBOBS.rc thanks to the variable POSTBOARD_MAILER_OPTS using all possible combinations of iso-8859-1 and utf-8 but without success.
Example :

POSTBOARD_MAILER_OPTS|-nx -e 'set assumed_charset="utf-8"' -e 'set charset="utf-8"' -e 'set config_charset="utf-8"' -e 'set send_charset="utf-8"'

The only quick and dirty way to get a mail with the correct encoding is to use the u2l function (currently added in the code of the vedit.pl script):

675c675
< $msg = u2l($msg);
---
>

Of course it won't fit all WebObs installations

What might be the best approach to integrate this cleanly into WebObs?

A first idea:
Create a new variable in WEBOBS.rc like POSTBOARD_ENCODING which could take the empty value (UTF-8 by default), 'utf-8' or 'iso-8859-1'
Edit the postboard.pl file:
If the variable is not defined or is 'utf-8', no conversion. If it is 'iso-8859-1', conversion of mail elements with the 'u2l' function.

Thank you in advance for your comments or suggestions.