Location of SMTP Settings

i am looking for the file where dolphin sets up the smtp settings during an installation? my server is setup with PHPSUexec, and needs to have the smtp settings corrected to go through exim on each users account, rather than trying to send mail from nobody.

currently the mails have just been getting returned, because the server will reject a mail if its from nobody@. so i need to know where to edit the smtp settings for dolphin.

later,
DosDawg

<form id="form_queue" action="/admin/notifies.php" method="post">

This is the form action from the mass mailer page so I would imagine the notifies.php file is where it's happening since this calls it as well as the cron does  ..... 
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