IP Blocked.

Hello,

I'm getting following bounce back while sending mails.

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  Ummarah.Javed@britishcouncil.org.pk
    host cluster3.eu.messagelabs.com [85.158.139.3]
    SMTP error from remote mail server after initial connection:
    501 Connection rejected by policy [7.7] 9016, please visit
www.messagelabs.com/support for more details about this error message.
  Hamza.Salim@britishcouncil.org.pk
    host cluster3.eu.messagelabs.com [85.158.139.3]
    SMTP error from remote mail server after initial connection:
    501 Connection rejected by policy [7.7] 9016, please visit
www.messagelabs.com/support for more details about this error message.