Filtered email from us will come from the following IP addresses to your mail server.  We recommend restricting your firewalls to only allow SMTP traffic from our addresses.


  • 52.15.56.229

  • 52.88.235.200

  • 52.208.174.36

  • 52.65.27.235

  • 52.67.179.13

  • 52.57.219.125