<?php
$rulesCollection = Mage::getModel('salesrule/rule')->getCollection();
foreach($rulesCollection as $rule){
$coupon = $rule->getCoupons();
}

$rules = Mage::getResourceModel('salesrule/rule_collection')->load();

foreach ($rules as $rule) {
$conditions = $rule->getConditionsSerialized();
var_dump($conditions);
}
?>

{{block type="core/template" name="email_coupon" template="email/coupon.phtml"}}

public function getAllActiveCoupon(){

        $coupontable = 'salesrule_coupon';
        $today = Mage::getModel('core/date')->date('Y-m-d');
        $select = $this->_read->select()
                ->from('salesrule', array('name', 'description'))
                 ->joinLeft(
                        array('sc' => $coupontable),
                        "(sc.rule_id = salesrule.rule_id) AND (sc.expiration_date IS NULL OR sc.expiration_date >= '{$today}')",
                        array('code'))

                ->where('is_active = ?', 1)
                ->where('from_date IS NULL OR from_date <= ?', $today)
                ->where('to_date IS NULL OR to_date >= ?', $today)
                ->where('is_rss = ?', 1);

        $result = $this->_read->fetchAll($select); //fetch all active couopon
        return $result;
    }

in view file

$coupons = $this->getActiveCoupon();
 <?php
        if (!empty($coupons)) :
            foreach ($coupons as $coupon):
                ?>
                <li>
                    <h2><?php echo $coupon['name']; ?></h2>
                    <p><?php echo $coupon['description']; ?> </p>
                </li>
<?php endforeach; ?>
<?php endif; ?>