code/Debug/Model/Core/Email.php
public function send()
    {
        try {
            $this->captureEmail();
        } catch (Exception $e) {
            Mage::logException($e);
        }

        return $this->parentSend();
    }
public function send()
    {
        try {
            $this->captureEmail();
        } catch (Exception $e) {
            Mage::logException($e);
        }

        return $this->parentSend();
    }
Overwrites parent method to capture details for sent e-mail

@return Sheep_Debug_Model_Core_Email