Formmail and Joomla 1.5

I’ve installed Joomla 1.5 on my non-english site and I made some custom forms using the dreamhost formmail script.

The forms data are being sent fine to my mail client (squirrel) but the characters are unreadable.

Joomla 1.5 is using utf-8 and I guess there is a problem somewhere between squirrel mail or the formmail script.

Can anyone help solve this problem? Thank you in advance for your time.
Kind regards