replaceVariables example

if ($element['typ'] === 'email') {
                $postEmail = trim($this->_postData[$element['id']]);
            }
        }

        if (!empty($postEmail)) {
            $mail->setReplyTo($postEmail);
        }

        $content = $this->View()->getAssign('sSupport');

        $mailBody = $this->replaceVariables($content['email_template']);
        $mailSubject = $this->replaceVariables($content['email_subject']);

        $receivers = explode(',', $content['email']);
        $receivers = array_map('trim', $receivers);

        $mail->setFrom(Shopware()->Config()->get('Mail'));
        $mail->clearRecipients();
        $mail->addTo($receivers);
        $mail->setBodyText($mailBody);
        $mail->setSubject($mailSubject);