Planet CS-2000 User Manual page 357

Step5 In Policy
Step6 In Configure
The mail relay setting of the external mails send to internal mail server
In Mail Relay, it can relay the mail to the assigned domain name which corresponds to the mail server.
CS-2000 UTM Content Security Gateway User's Manual
DMZ To WAN , add the following settings：
Set the DMZ To WAN policy
Mail Relay , add the following settings：
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