Can't set Return-Path in emails

[HouseAddict]

Whenever I go to Send Email to Users in the admin, I can't get vBulletin to include a Return-Path. I traced the code to here:


//class_mail.php
class vB_Mail
{
/**
* Actually send the message.
*
* @return boolean True on success, false on failure
*/
function send()
{
if (!$this->toemail)
{
return false;
}

@ini_set('sendmail_from', $this->fromemail);

if (SAFEMODE AND $this->registry->options['needfromemail'])
{
$result = @mail($this->toemail, $this->subject, $this->message, trim($this->headers), '-f ' . $this->fromemail);
}
else
{
$result = @mail($this->toemail, $this->subject, $this->message, trim($this->headers));
}

$this->log_email($result);
return $result;
}
}

If I print_r the $this object from function send() I get the following



[headers] => From: "webmaster@domain.com" <webmaster@domain.com>
Return-Path: webmaster@domain.com
Message-ID: <200811072258.ba445c190546@domain.com>
MIME-Version: 1.0
Content-Type: text/html; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Priority: 3
X-Mailer: vBulletin Mail via PHP
X-EZbouncer: http://www.domain.com/admin/ezbounce.php?u=10417



A Return-Path is being included in the headers but when I get the email it looks like the following:


Delivered-To: user@domain.com
Received: by 10.142.193.3 with SMTP id q3cs243244wff;
Fri, 7 Nov 2008 14:05:01 -0800 (PST)
Received: by 10.90.91.9 with SMTP id o9mr3560390agb.117.1226095499865;
Fri, 07 Nov 2008 14:04:59 -0800 (PST)
Return-Path: <nobody@host.domain.com>
To: user@domain.com
Subject: test
From: "webmaster@domain.com" <webmaster@domain.com>
Message-ID: <200811072258.ba445c190546@domain.com>
MIME-Version: 1.0
Content-Type: text/html; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit


This thread (http://www.vbulletin.com/forum/showthread.php?t=87768) about nobody being included in the headers is all I could find. It seems like nobody@host.domain.com is the default sender in sendmail but it shouldn't be used if a Return-Path is provided.

[noppid]

Have you tried SMTP? PHP mail is nobody. The vBulletin mailer leaves a lot to be desired. Good luck.

[HouseAddict]

I shouldn't have to use SMTP. There should be a reason the Return-Path isn't getting set