title: Can't connect Office365 to Laravel mail
body: <p>I connected <strong>Office365</strong> account to laravel smtp mailer. But when I want to send mail I get exception:</p>
  
  <blockquote>
    <p><em>Expected response code 250 but got code "550", with message "550 5.7.708 Service unavailable. Access denied, traffic not accepted from this IP. For more information please go to
    <a href="http://go.microsoft.com/fwlink/?LinkId=526653" rel="nofollow noreferrer">http://go.microsoft.com/fwlink/?LinkId=526653</a> AS(8561)</em></p>
  </blockquote>
  
  <p>I also added my server IP to <em>Admin->Protected->Connection filter->Allowed IP list.</em></p>
  
  <p>My .env: </p>
  
  <pre><code>MAIL_DRIVER=smtp
  MAIL_HOST=smtp.office365.com
  MAIL_PORT=25
  MAIL_USERNAME=username
  MAIL_PASSWORD=pass
  MAIL_ENCRYPTION=tls
  MAIL_FROM_ADDRESS=username
  MAIL_FROM_NAME=MyOffice
  </code></pre>