Magento send mails like contact us form or forms or how to send mails in magento

if(!empty($post)) { $translate = Mage::getSingleton('core/translate');
$translate->setTranslateInline(false); try { $name = $_POST['name'];
$email = $_POST['email']; $to_admin =
Mage::getStoreConfig('trans_email/ident_general/email'); $name_admin =
Mage::getStoreConfig('trans_email/ident_general/name'); $subject =
'Contact Us'; /*$vars = array('Name'=>$name, 'Email Id' =>$email ); */

//const EMAIL_TEMPLATE_XML_PATH = 'customer/testemail/email_template';
//$templateId = Mage::getStoreConfig(EMAIL_TEMPLATE_XML_PATH);
$templateId=1; $sender = array('name' => $name,'email' => $email);

$translate=Mage::getModel('core/email_template')
->setTemplateSubject($subject) ->sendTransactional($templateId, $sender,
$to_admin, $name_admin, array('data' => $vars));
$translate->setTranslateInline(true);

Mage::getSingleton('core/session')->addSuccess(Mage::helper('customer')->__('Data
Sent Successfully')); $url = Mage::getUrl().'thanks';
Mage::app()->getFrontController()->getResponse()->setRedirect($url); }
catch (Exception $e) {
Mage::getSingleton('core/session')->addError(Mage::helper('customer')->__('Unable
to send email.')); $url = Mage::getUrl().'contactus';
Mage::app()->getFrontController()->getResponse()->setRedirect($url);
return; } }