[Mail]mb_encode_mimeheader

Hi ! I need some help for mail's encoding structure. I use this code for encoding french character like 'é' or 'è':

           mb_language('uni');
           mb_internal_encoding(mb_detect_encoding($this->subject));
           $res = mail('yyy@xxx.net', mb_encode_mimeheader($this->subject), $this->msgTxt.$this->msgHTML, $this->entete, '-fpostmaster@xxx.net');

It is working fine unless if my first word is not containing one of those multi-bites characters! For example : Subject : êtes vous francais ou étranger ? => It is well encode and all is fine on differents mail software and webmail Subject : Bonjour, êtes vous francais ? => It is encode at the beginnning of the second word. So it is not well written on some softwre like Incredimail for example. Does someone know where i am wrong ? Thanks a lot for your help Sylvain Gourvil ___________________________________________________________________________ Appel audio GRATUIT partout dans le monde avec le nouveau Yahoo! Messenger Téléchargez cette version sur http://fr.messenger.yahoo.com