note 50553 added to ref.mail

Does the Return-Path make any difference which contributes to mail being send to JUNK MAIL at the recipient email folder? $to: recipient email (inputted from form) such as $email; $from: $sendername <sender email>; $Return-Path: $sendername <sender email>; I realised that when I specify my Return-Path in my php coding, it doesn't overwrite the message source which was handles by my Hosting Company Web Server (such as httpd@email.com.sg). How can I check whether will this cause any issues? Please advise. I am already out of my wit now as I have tried many ways. Thanks ALOT! ---- Manual Page -- http://www.php.net/manual/en/ref.mail.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+50553 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+50553&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+50553&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+50553&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+50553&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+50553&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+50553&report=yes Search -- http://master.php.net/manage/user-notes.php