SimpleSoftwareIO\SMS\Drivers\EmailSMS::buildEmail PHP Method

    protected function buildEmail($number, OutgoingMessage $message)
    {
        if (!$number['carrier']) {
            throw new \InvalidArgumentException('A carrier must be specified if using the E-Mail Driver.');
        }
        return $number['number'] . '@' . $this->lookupGateway($number['carrier'], $message->isMMS());
    }