Sendgrid邮件不发送

Question

我注册了sendgrid，并按照他们的教程，但我不能为我的生活得到它发送电子邮件。有什么建议吗？

<?php
require_once 'unirest-php/lib/Unirest.php';
require_once 'sendgrid-php/lib/SendGrid.php';
SendGrid::register_autoloader();
$sendgrid = new SendGrid('johnpc@umich.edu', 'PASSWORD', array("turn_off_ssl_verification" => true));
$email    = new SendGrid\Email();
$email->addTo('johnpc@umich.edu')->
   setFrom('johnpc@umich.edu')->
   setSubject('Subject goes here')->
   setText("Testing 123")->
   setHtml('<strong>Hello World!</strong>');

$sendgrid->web->send($email);
if($_GET['email']) echo "Your email has been sent!";
?>