setDefaultTransport example

        unset($options['type'], $options['charset']);

        if ($transportName === Zend_Mail_Transport_Smtp::class) {
            $transport = Enlight_Class::Instance($transportName, [$options['host'] ?? null, $options]);
        } elseif (!empty($options)) {
            $transport = Enlight_Class::Instance($transportName, [$options]);
        } else {
            $transport = Enlight_Class::Instance($transportName);
        }
        \assert($transport instanceof Zend_Mail_Transport_Abstract);
        Enlight_Components_Mail::setDefaultTransport($transport);

        if (!isset($options['from']) && !empty($config->Mail)) {
            $options['from'] = ['email' => $config->Mail, 'name' => $config->Shopname];
        }

        if (!empty($options['from']['email'])) {
            Enlight_Components_Mail::setDefaultFrom(
                $options['from']['email'],
                !empty($options['from']['name']) ? $options['from']['name'] : null
            );
        }