The default transport for a Zend_Mail instance is
Zend_Mail_Transport_Sendmail. It is essentially a wrapper to the
PHP mail() function. If you
wish to pass additional parameters to the mail() function, simply
create a new transport instance and pass your parameters to the constructor. The new
transport instance can then act as the default Zend_Mail
transport, or it can be passed to the send() method of
Zend_Mail.
Example 574. Passing additional parameters to the Zend_Mail_Transport_Sendmail transport
This example shows how to change the Return-Path of the mail() function.
<?php
$tr = new Zend_Mail_Transport_Sendmail('-freturn_to_me@example.com');
Zend_Mail::setDefaultTransport($tr);
$mail = new Zend_Mail();
$mail->setBodyText('This is the text of the mail.');
$mail->setFrom('somebody@example.com', 'Some Sender');
$mail->addTo('somebody_else@example.com', 'Some Recipient');
$mail->setSubject('TestSubject');
$mail->send();
Safe mode restrictions
The optional additional parameters will be cause the mail() function to
fail if PHP is running in safe mode.
Sendmail Transport and Windows
As the PHP manual states the mail()
function has different behaviour on Windows and on *nix based systems. Using the
Sendmail Transport on Windows will not work in combination with
addBcc(). The mail() function will
sent to the BCC recipient such that all the other recipients can see him as
recipient!
Therefore if you want to use BCC on a windows server, use the SMTP transport for sending!