ZyXEL Communications ZYWALL USG 2000 Support Notes page 178

ZyWALL USG 2000 Support Notes
Step 2. Add Policy
Since email server is located outside LAN, and the best way of filtering spam emails is to scan
all incoming emails before end users receive them. Therefore, we set the email direction as
"From WAN to LAN" in the policy configuration. Additionally, we can choose which kind of
list (black list and/or white list) we want to apply.
Step 3. Editing Black/White List
You can add an open relay server to the Black List in Anti-spam/ "White/Black List"/ Black
list. Here, you need to select the check box and add a special tag in the title of suspected spam
emails if you want. Then, we edit our owned black list that displays the relayed email servers
we do not trust.
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