Identify IP addresses that you can use to accept emails coming only from HES servers.
For new customers to receive emails coming only from HES servers, configure the firewall to accept emails only from the following IP addresses:
For EMEA Site:
For All Other Regions:
- Additionally, if the customer’s firewall, MTA, or mail server is configured to check any IP Reputation / RBL service provider, the same set of IP blocks above must be added to the IP Reputation approved list. Another option is to disable the IP Reputation checking on the firewall, MTA, or mail server and let HES handle this task.
Should you need assistance regarding your firewall, contact your network administrator.