Using Different Transports
In case you want to send different e-mails through different connections, you can also pass the
transport object directly to send() without a prior call to
setDefaultTransport(). The passed object will override the default transport for the
actual send() request.
Example #1 Using Different Transports
$mail = new Zend_Mail();
// build message...
$tr1 = new Zend_Mail_Transport_Smtp('server@example.com');
$tr2 = new Zend_Mail_Transport_Smtp('other_server@example.com');
$mail->send($tr1);
$mail->send($tr2);
$mail->send(); // use default again
Note: Additional transports
Additional transports can be written by implementing Zend_Mail_Transport_Interface.