title: PHPMailer sends with TLS even when encryption is not enabled
body: <p>I am trying sending email using PHPMailer without TLS, but PHPMailer still tries to send email with TLS even if I do not enable it:</p>
  
  <pre><code>include_once("PHPMailer-master\PHPMailerAutoload.php");
  
  $To = 'some@site.com';
  $Subject = 'Topic';
  $Message = 'msg test';
  
  $Host = 'site.com.br';
  $Username = 'contact@site.com.br';
  $Password = 'pass';
  $Port = "587";
  
  $mail = new PHPMailer();
  $body = $Message;
  $mail-&gt;IsSMTP(); // telling the class to use SMTP
  $mail-&gt;Host = $Host; // SMTP server
  $mail-&gt;SMTPDebug = 1; // enables SMTP debug information (for testing)
  // 1 = errors and messages
  // 2 = messages only
  $mail-&gt;SMTPAuth = true; // enable SMTP authentication
  //$mail-&gt;SMTPSecure = 'ssl'; //or tsl -&gt; switched off
  $mail-&gt;Port = $Port; // set the SMTP port for the service server
  $mail-&gt;Username = $Username; // account username
  $mail-&gt;Password = $Password; // account password
  
  $mail-&gt;SetFrom($Username);
  $mail-&gt;Subject = $Subject;
  $mail-&gt;MsgHTML($Message);
  $mail-&gt;AddAddress($To);
  
  if(!$mail-&gt;Send()) {
      $mensagemRetorno = 'Error: '. print($mail-&gt;ErrorInfo);
      echo $mensagemRetorno;
  } else {
      $mensagemRetorno = 'E-mail sent!';
      echo $mensagemRetorno;
  }
  </code></pre>
  
  <p>After send email, I got this message:</p>
  
  <pre><code>2016-09-01 21:08:55 CLIENT -&gt; SERVER: EHLO www.johnmendes.com.br
  2016-09-01 21:08:55 CLIENT -&gt; SERVER: STARTTLS
  2016-09-01 21:08:55 SMTP ERROR: STARTTLS command failed: 454 TLS not available due to temporary reason
  2016-09-01 21:08:55 SMTP Error: Could not connect to SMTP host.
  2016-09-01 21:08:55 CLIENT -&gt; SERVER: QUIT
  2016-09-01 21:08:55 SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
  SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
  Erro ao enviar e-mail: 1
  </code></pre>
  
  <p>The server doesn't support ssl or tls.</p>
  
  <p>Any idea?</p>