PHP/Sendmail problem

[hammer65]

I am trying to send email from a PHP script. I have tried using PHPMailer used with the mailer set to use the PHP mail function, and to use Sendmail directly, and I have used mail() on it's own. In all cases, the return-path is reset from the email I specify by setting a return-path header, to apache@theseverdomain.com. I can set the -f command option to fix the problem, but I would prefer not to have to do this, but instead just specify the header.

I believe that the rule in the Sendmail.cf that is causing this, is


[code]
H?P?Return-Path: <$g>
[/code]

The explanation I found for this doesn't make complete sense to me.

[quote]
  This line defines a field called Return-Path: that displays the contents of
  the $g macro (sender address relative to the receiver).  The ?P? portion
  indicates that this line is only used if the mailer uses the P flag (the
  mailer requires a Return-Path line).
[/quote]

Does somebody know, how I can get Sendmail to stop re-writing this header, so I can set it the way I want to? Is it safe to just comment out that line?