title: Zimbra deployment issue
body: <p>Zimbra mail server was deployed and mails are working but after sometime this message comes:
  . Cannot connect to the ZCS upstream server. Connection is refused.
  Which is due to many processes opened by Zimbra mail deployment on VPS told by VPS assistant.
  Once I restart VPS then mails become ok for few days but then same thing happens.</p>
  <p>Would appreciate your help.</p>
  <p>Thanks</p>
  <p>Best Regards
  Khaliq</p>