Dreaded Return-Path and mail()

Okay, I've read just about everything on the Internet about how the change the Return-Path header in an e-mail sent using mail(), but, I STILL can't get it to work. All e-mail sent via PHP says Return-Path: nobody@domain.com and Received: (from nobody@localhost). I have a Red Hat Linux 7.2 server running PHP 4.2.2. I've tried the following and none of them worked: + I put the following in my Apache httpd.conf file: php_admin_value sendmail_path "/usr/bin/sendmail -t -i -f me@domain.com" I also tried this without -t and -i. None of them worked. I did remember to re-start Apache each time so the settings took effect. + I tried adding "-f me@domain.com" as the fifth parameter for the mail() command, but, that didn't make a difference either. Actually, as I have other items for the fifth "header" parameter, I wasn't sure where the above command should be placed. I tried at the beginning and end of other header info I was placing, but, nothing seemed to work. + I added "nobody" to Sendmail's trusted users. No difference. Is there anything else I can try? I want to avoid changing this in the PHP.ini file because I don't want e-mail from all domains to look like it is coming from a single domain, if possible. Thanks!