Outbound sms with an email address.

sms.php

<?php
require_once('Services/Twilio.php');
$ACCOUNT_SID = "ACxxxxxxxxxxxxxxxxxxxxx";
$AUTH_TOKEN = "yyyyyyyyyyyyyyyyyyyyyyyy";

$client = new Services_Twilio($ACCOUNT_SID, $AUTH_TOKEN);
$message = $client->account->messages->sendMessage(
  '+15556667777', // From a Twilio number in your account
  '+15558675309', // Text any number
  "Email me at [email protected]"
);

print $message->sid;