Sending Mail Within Magento

<?php
$mail = Mage::getModel('core/email');
$mail->setToName('Your Name');
$mail->setToEmail('Youe Email');
$mail->setBody('Mail Text / Mail Content');
$mail->setSubject('Mail Subject');
$mail->setFromEmail('Sender Mail Id');
$mail->setFromName("Msg to Show on Subject");
$mail->setType('html');// YOu can use Html or text as Mail format

try {
$mail->send();
Mage::getSingleton('core/session')->addSuccess('Your request has been sent');
$this->_redirect('');
}
catch (Exception $e) {
Mage::getSingleton('core/session')->addError('Unable to send.');
$this->_redirect('');
}
?>

Source