title: Problem in Send Mail using Swift Mailer using Office 365
body: <p>I tried Swift-mailer services for sending mail .. my organization using Outlook 365. 
  Below is the configuration. 
  <code>$transport = (new \Swift_SmtpTransport('outlook.office365.com', 587,'tls'))</code></p>
  
  <p>but i am getting authentication error
  i tried in gmail. works fine.port number which i tried is 587 as well as 443.. both are showing authentication error. Any idea?</p>
  
  <p><code>$transport = (new \Swift_SmtpTransport('smtp.office365.com', 587,'tls'))</code></p>
  
  <p>Failed to authenticate on SMTP server with username "Username@Organization.com" using 1 possible authenticators. Authenticator LOGIN returned Expected response code 235 but got code "535", with message "535 5.7.3 Authentication unsuccessful [MAXPR0101CA0037.INDPRD01.PROD.OUTLOOK.COM]
  ".</p>