Any email spooled from our service will come from the following IP addresses:


  • 54.149.19.224
  • 54.149.147.54


Please do not whitelist the above addresses.  Your standard anti-spam measures should be employed against the mail you receive from our backup mx service.  Instead please make sure your firewall or anti-spam device does not do any throttling to any rate and connection limits against connections from the above IP addresses.


NOTE: If you also subscribe to our ClearMX anti-spam filtering service and use the backup mx service in conjunction with that you can safely whitelist the above IP addresses.