Planet CS-2000 User Manual page 297

Step4 In Policy
Click New Entry.
Destination Address, select Mail_Server.
Service, select Mail_Service.
Click OK.
Step5 Complete to set the WAN To DMZ mail service policy.
CS-2000 UTM Content Security Gateway User's Manual
WAN To DMZ , add the following settings：
To set the WAN To DMZ mail service policy
Complete to set the WAN To DMZ mail service policy
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