title: Send Mail by MimeMessageHelper sends mail to All CC but in rackspace it shows only one email id in CC
body: <p>i am sending mail with help of spring in which i want  <strong>multiple email ids in CC, all receives the mail but problem is when they open the email in rackspace(apps.rackspace.com) it shows only one email id in CC but actually there is multiple email ids and when i open same mail in Mozilla Thunderbird it shows all email ids that i have set in CC of mail</strong></p>
  
  <blockquote>
    <p>cc in rackspace is shown as 
         CC:test@mydomain.com  (here 3 email ids in cc,but rackspace shows only one)</p>
    
    <p>cc in Mozilla Thunderbird is shown as 
         CC:test@mydomain.com,test2@mydomain.com,test3@mydomain.com  (here all 3 email ids in cc is displaying)</p>
  </blockquote>
  
  <p>My mail sending code is :</p>
  
  <p>here  this are the classes which i am using in below code, yes i am initializing this objects that i have not shown here</p>
  
  <pre><code>JavaMailSender mailConfig;
  MimeMessageHelper helper;
  MimeMessage message;
  String[] to;    
  String[] cc;
  
  
  try {
  
      message.setContent(msg, "text/html; charset=utf-8");
      message.setHeader("Content-Type", "text/html; charset=utf-8");
  
      if (toEmailIds == null) {
          helper.setTo(to);
      } else {
          String[] toIds = toEmailIds.split(",");
  
          for(String toAddress : toIds){
              helper.addTo(toAddress);
          }
  
      //  helper.setTo(toIds); tried this too but it doesnot make any change
      }
  
      if (ccEmailIds != null) {
  
          for(String ccAddress : ccEmailIds){
              helper.addCc (ccAddress);
          }
  
      //  helper.setCc(ccEmailIds);
      }
  
      if (subject == null) {
          helper.setSubject(defaultSubject);
      } else {
          helper.setSubject(subject);
      }
  
      SendMailByThread sendmailthread = new SendMailByThread(mailConfig, message);
      new Thread(sendmailthread).start();
  } catch (Exception e) {
      isSentSuccessfully = false;
      StringBuilder sb = new StringBuilder("cannot send mail to : ");
      sb.append(Arrays.toString(to));
      sb.append(" \nerror message is : ");
      sb.append(e.getMessage());
      sb.append(" \nemail content is : \n");
      sb.append(msg);
      log.error(sb.toString(), e);
      sb = null;
  }
  return isSentSuccessfully;
  </code></pre>