Why postfix doesn't follow From header from PHP mail();

Question

I have installed postfix with no config option.

I am trying to send email with php mail(); it works but it sends email with the default email of my dedicated server.

Are there anyway to tell postfix to follow the header set by mail function?

Thanks

Code

$from='no-reply@mywebsite.com';
$fromname='my Website';
mail($mailto,$subject,$text,'From: ' . $fromname . ' <'.$from.'>');

Answer 1

Try using the -f and -r additional parameters to override the from header and return path respectively.

mail(
    $mailto,
    $subject,
    $text,
    "From: " . $fromname . " <".$from.">",
    "-f $from -r mybounceemail@example.com");

From the postfix sendmail man page:

   -f sender
     Set the envelope sender address. This is the address where delivery problems are sent to.  With  Postfix  versions  before  2.1,  the
     Errors-To: message header overrides the error return address.


   -r sender
     Set the envelope sender address. This is the address where delivery problems are sent to.  With  Postfix  versions  before  2.1,  the
     Errors-To: message header overrides the error return address.

Answer 2

If you have a million mail() and do not want to recode all your mail() functions... you can set in your php.ini the following... and it will universally set all you php mail() functions to use it.

sendmail_path = sendmail -t -f do_not_reply@your.com