title: Unable to send email from Laravel 5.2 using MailGun
body: <p>I am trying to use the built-in driver for Mailgun to send email. Here's what I have done so far.</p>
  
  <p>Installed Guzzle driver.</p>
  
  <p>Added the following to my config\services.php </p>
  
  <pre><code>'mailgun' =&gt; [
      'domain' =&gt; env('sandbox54d5c9ed96434d689f971fd3.mailgun.org'),
      'secret' =&gt; env('key-e800aa77cbda23ee8471dd5e'),
  ],
  </code></pre>
  
  <p>In my config\mail.php I have added 
      'driver' => env('MAIL_DRIVER', 'mailgun'),</p>
  
  <p>However, now if I try to do forget password. It says we have sent an email but I don't get anything.</p>
  
  <p>The domain is my sandbox domain name and secret is the API Key.</p>
  
  <p>Am I missing something here or doing something wrong? How can I debug if there are some issues?</p>