Mail RETURN-PATH

I have a question. Is possible to hide or change the line "Return-Path" witch is added to all of e-mails sent with function MAIL()? If I send a mail with function MAIL() from my PHP script, even if in the $HEADER are lines "From", "Reply-to" and "Return-Path", in the mail I recieved is in header line "Return-Path:" twice. The first is added form PHP.INI file and the second is form the $HEADER used in MAIL() function. Every mail client or server use the first line, where is the e-mail address from PHP.INI. Is possible to change the line in PHP.INI file everytime i send an e-mail? Or how to remove "Return-Path" line completly form mail header? Thank You Ketan