Cloudmark Server Edition Online Help
In order to share whitelists between multiple servers, you can import and export whitelists.
The whitelist file must be a text file containing email addresses, hostnames, domain names, and full or partial IP addresses (in CIDR format), one entry per line.
If there are already entries in your whitelist, a prompt appears, asking you to specify whether you want to append the new entries to the existing whitelist or overwrite the existing whitelist.
The imported entries now appear in the Whitelist tab.