PLANET CS-2001 - Manual (Page 470)

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13.1.1 Detecting Whether Emails are Spam
Prerequisite Setup
Configure Port1 as LAN1(192.168.1.1, NAT/ Routing mode) and connect it to the
LAN which is using 192.168.1.x/24.
Configure Port2 as WAN1(61.11.11.11) and connect it to the ADSL Termination Unit
Remote to access the Internet. IP range: 61.11.11.10 to 61.11.11.14.
Configure Port3 as WAN2(211.22.22.22) and connect it to the ADSL Termination
Unit Remote to access the Internet. IP range: 211.22.22.18 to 211.22.22.30.
Configure Port4 as DMZ1 (Transparent Routing mode) and connect to the mail server.
IP address: 61.11.11.12.
Step 1. To enable internal users to receive emails from an external mail server,
configure the setting of Preferred DNS Server in Internet Protocol
(TCP/IP) Properties on local computer. (Note: the DNS server can be any
external DNS server, please decide which to use on your own.)
Step 2. To enable external users to receive emails from internal mail server, set as
below:
1. Deploy the mail server in DMZ.
2. Type “61.11.11.12” in the IP Address field of Internet Protocol
(TCP/IP) Properties.
3. Configure the Preferred DNS Server field in Internet Protocol
(TCP/IP) Properties. (Use an external DNS server to resolve domain
names)
4. Name the server as “supportplanet.com.tw”.