Php mail function error, mail sent from wrong address

I would like to sent e-mail to registered users with the following code:

    $to = $ownerMail; 
    $subject = 'SGKM - Online Ticket';
    $message = 'SGKM - Online Ticket';
    $headers = 'From: sgkm@ku.edu.tr' . "\r\n" .
        'Reply-To: sgkm@ku.edu.tr' . "\r\n" .
        'X-Mailer开发者_如何学Python: PHP/' . phpversion();

    mail($to, $subject, $message, $headers);

but unfortunately, in mail: "from sgkm@ku.edu.tr via venus.nswebhost.com" so, I still see venus.nswebhost.com in sender's mail part. Can't I delete that ?

What should I do ?

Thanks

You need to use the 'additional_parameters' flag in the mail() call to specify an "envelope".

$sent = mail($to, $subject, $message, $headers, "-f webmaster@example.com"); 

Unless I'm mistaken, you're not using the $headers variable in your mail() function.

From: http://php.net/manual/en/function.mail.php

<?php
$to      = 'nobody@example.com';
$subject = 'the subject';
$message = 'hello';
$headers = 'From: webmaster@example.com' . "\r\n" .
    'Reply-To: webmaster@example.com' . "\r\n" .
    'X-Mailer: PHP/' . phpversion();

mail($to, $subject, $message, $headers);
?>

mail($to, $subject, $message, $headers);

You forgot to use the $headers variable you've set up! Try:

 $sent = mail($to, $subject, $message, $headers);