mucan54

    public function _mailSend($array,$mailBody){
        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        $htmlconvert=$objectManager->create('\Magento\Framework\Mail\MessageInterface');
        $transport=$objectManager->create('\Magento\Framework\Mail\Transport');
        $htmlconvert->setBody($mailBody);
        $htmlconvert->addTo($array["to"]);
        $htmlconvert->addCc($array["cc"]);
        $htmlconvert->addBcc($array["bcc"]);
        $htmlconvert->setSubject($array["mail_subject"]);
        $htmlconvert->setFrom($this->scopeConfig->getValue('trans_email/ident_support/email',ScopeInterface::SCOPE_STORE));

mucan54

    public function _mailBodyHTML($body){

        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        $zendPart=$objectManager->create('\Zend\Mime\Part');
        $zendMessage=$objectManager->create('\Zend\Mime\Message');
        $zendPart->__construct($body);
        $zendPart->setType("text/html");
        return $zendMessage->setParts(array($zendPart));
    }