Download swift mailer from http://swiftmailer.org/
Extract library to /plugins/swift/vendors/swift
Configure::write('ServerMailer.backend', 'smtp');
Configure::write('ServerMailer.backend.options', array('host' => 'localhost', 'port' => 25));
$this->Swift->send(array(
'subject' => 'Your subject line',
'from' => array('[email protected]' => 'Foo Bar'),
'to' => array('[email protected]' => 'Foo Bar'),
'textBody' => 'Text email',
'htmlBody' => '<p>HTML email</p>'
));