Change return-path of email message sent in linux + postfix

Question

I am trying to test DMARC settings in order to avoid 5322.From header spoofing attacks and I need a quick way to send messages using different From and Return-path addresses. I've tried:

mail -a "Return-Path: [e-mail]" -a "Reply-To: [e-mail]" \
 -a "From: [e-mail]" [e-mail]

This doesn't work (it uses the From: address for return-path).

I've also tried changing postfix smtp_generic_maps. This changes all the addresses.

Is there any simple way to do this from the command line without having to telnet to a MX and speak SMTP?

Simple perl or PHP script would be acceptable.