note 52432 added to function.mail

I dont know why but the html mail from these codes dont work in outlook express but work in hotmail. why is this? I know it can be done ---- Manual Page -- http://www.php.net/manual/en/function.mail.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+52432 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+52432&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+52432&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+52432&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+52432&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+52432&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+52432&report=yes Search -- http://master.php.net/manage/user-notes.php