[imp] [DIMP] Display of characters whith accents

["BÉROUJON Laurent - CETE Lyon/DI/ET/PAMELA"]

Hello,

horde-webmail 1.2
Those characters (éàèù...) are not displayed in dimp. The words 
containing such characters are cut before the encoded characters.
For example, "Boîte de réception" is displayed "Bo", "éléments envoyés" 
is not displayed at all, ...
Where can i define a charset iso-8859-15 ?

Regards