note 55281 added to ref.mail

hi everybody, my form sends an email to Yahoo mail and yahoo sends the email to bulk folder. the email is not spam and i don't know how to solve this problem. my code is : mail($_POST['mailto'],$_POST['subject'],$msgBody,"From: \"".$fromname."\" <".$_POST['from'].">\r\nContent-type: text/html; charset=utf-8\r\nReply:{$_POST['from']}\r\n"); ---- Submitter IP: 80.191.36.10 (proxied: 80.191.36.10, 80.191.36.10) ---- Manual Page -- http://www.php.net/manual/en/ref.mail.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+55281 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+55281&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+55281&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+55281&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+55281&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+55281&report=yes&reason=non-english Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+55281&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+55281&report=yes Search -- http://master.php.net/manage/user-notes.php