title: Swiftmailer successfully sends but no mail received
body: <p>I have made a simple contact form and use swiftmailer(with symfony2) to send and email.</p>
  
  <p>Everything is fine when I'm using gmail account but on production it has to be a noreply address in website domain.
  So I changed parameters to correspond this email account.</p>
  
  <p>It looks like it is working a send method return true but no message is received, i checked a spam folder but it didn't get there either. Settings are 100% correct as they work in thunderbird. </p>
  
  <p>Have no idea where to look for a problem. Any suggestions what should I check?</p>
  
  <p>I have tried to send email with PHPMailer using same account and it worked so it seems problem is just with swiftmailer.
  I'm sending emails in few more places in my project and would like to avoid changing it now but fix it instead.</p>