How to pass extra parameter to mail function from magento

Question

I want to send extra parameter to mail function in magento. I didn't find any raw mail function in magento, can any one help me where I will get that function.

mail($to, $subject, $message, $headers, 'Iwantopassthis@test.com'); // I want to pass 5th parameter

Answer 1

If you magento is using sendmail to send an email, you can find the mail() function in Zend_Mail_Transport_Sendmail. Check the method public function _sendMail().

You can find this file in lib/Zend/Mail/Transport/Sendmail.php of your magento 1 root and vendor/magento/zendframework1/library/Zend/Mail/Transport/Se‌​ndmail.php in your magento2 root. Also it is not recommended to edit this file directly. If you want to modify this, copy this file to app/code/local/Zend/Mail/Transport/Sendmail.php (there won't such directories by default but you can create) and then modify the method _sendMail();

Answer 2

The additional_parameters parameter can be used to pass an additional parameter.

<?php
mail('nobody@example.com', 'the subject', 'the message', null,
   '-fwebmaster@example.com');
?>

For more detail additional-parameters