SendGrid Configuration for Zend Framework

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<?php
$config = array(
    'username' => 'sendgridusername',
    'password' => 'sendgridpassword',
    'auth' => 'plain'
);

$transport = new Zend_Mail_Transport_Smtp('smtp.sendgrid.net', $config);

$mail = new Zend_Mail();
$mail->setFrom('you@example.com', 'Your Name');
$mail->setSubject('Email Test');
$mail->setBodyHtml('<p>Test</p>');
$mail->send($transport);

$mail->addTo('you@example.com');