german umlauts with e-mail after installing new system

Hi,

I recently installed a new e-mail-server using taolinux 4 (RHEL4) and
got some problems with german umlauts.

That I tested was sending an e-mail from our webmailsystem twig and an
other from my thunderbird client.

I got two diffrent results:

sending from twig lets the subject (ö, ä, ü) unchanged, the mailtext is
unreadebel.

sending from thunderbird changes the subject to strange symbols, the
mail text is fine.

I use sendmail.

Where can I look, for what could be wrong?

Thanks and regards

Götz Reinicke
-- 
Götz Reinicke
IT Koordinator - IT OfficeNet

Tel. +49 (0) 7141 - 969 420
Fax  +49 (0) 7141 - 969 55 420
goetz.reinicke-zTKeak/Cq/[email protected]

Filmakademie Baden-Württemberg
Mathildenstr. 20
71638 Ludwigsburg
www.filmakademie.de