make sure u tryed again the changes I suggested on first page (btw, I just updated it, there was a little mistake I made previosly).
if it fails, then try insert in global.php above:
$msg = "";
this:
ini_set("sendmail_from", $config['site_email']);
and if it still fails, then send this to your hoster:
The user that the webserver runs as should be added as a trusted user to the sendmail configuration to prevent a 'X-Warning' header from being added to the message when the envelope sender (-f) is set using this method. For sendmail users, this file is /etc/mail/trusted-users.
(
reference)
P.S.
sendmail_from is what u are looking for, not
SERVER_ADMIN setting
