title: PHPMailer: hyperlink appears in brackets in outlook
body: <p>I use phpmailer to send an email with a hyperlink on its body. I have this code: </p>
  
  <pre><code>$body = "&lt;a href='".DIR."activate.php?x=$id&amp;y=$activasion'&gt;".DIR."activate.php?x=$id&amp;y=$activasion&lt;/a&gt;";
  require('classes/PHPMailerAutoload.php');
          $mail = new PHPMailer;
          $mail-&gt;CharSet = "UTF-8";
          $mail-&gt;SMTPDebug = 2;             // Enable verbose debug output
          $mail-&gt;isSMTP();                  // Set mailer to use SMTP
          $mail-&gt;Host = SMTP_HOST;          // Specify main and backup SMTP servers
          $mail-&gt;SMTPAuth = true;           // Enable SMTP authentication
          $mail-&gt;Username = SMTP_USER;      // SMTP username
          $mail-&gt;Password = SMTP_PASSWORD;  // SMTP password
          $mail-&gt;SMTPSecure = 'ssl';        // Enable TLS encryption, `ssl` also accepted
          $mail-&gt;Port = 465;                // TCP port to connect to
          $mail-&gt;setFrom(SMTP_USER);
          $mail-&gt;addAddress($to);           // Add a recipient Name is optional
          $mail-&gt;isHTML(true);              // Set email format to HTML
          $mail-&gt;Subject = $subject;
          $mail-&gt;Body    = $body;
          $mail-&gt;AltBody = $altbody;
          if(!$mail-&gt;send()) {
              echo $mail-&gt;ErrorInfo;
          }
  </code></pre>
  
  <p>When I send the email to a Gmail address and open it in Gmail the hyperlink looks fine (I can click on the link and redirect to the page).</p>
  
  <p>But when I send it to Outlook the hyperlink looks like this:</p>
  
  <blockquote>
    <p>[my.domain.com/activate.php?x=52&amp;y=aa1fdf437c526ee219decc1ea72fc266]my.domain.com/activate.php?x=52&amp;y=aa1fdf437c526ee219decc1ea72fc266 </p>
  </blockquote>
  
  <p>Any ideas on what might be wrong?</p>