pbe accent ispconfig3_autoreply

[girardan]

hi

I've activated ispconfig3_autoreply plugin, with french language. When i enter text in message, it's good well display in the roundcube  interface; but when autoreply mail is sent, there is a pbe with accent like this :
je suis absent la journ�e du 16 de retour � 22 heures
���

normally, i'd have journée and à 22 heures and for three others it's a test ùèà

thanks in advance