ZyXEL Communications 5 Series User Manual

Chapter 16 Anti-Spam Screens

ZyWALL 5/35/70 Series User’s Guide

Click SECURITY > ANTI-SPAM > Lists to display the Anti-Spam Lists screen.

Configure the whitelist to identify legitimate e-mail. Configure the blacklist to identify spam 
e-mail. You can create whitelist or blacklist entries based on the sender’s IP address or e-mail 
address. You can also create entries that check for particular MIME headers, MIME header 
values or specific subject text. 

Action for No Spam 
Score

Use this field to configure what the ZyWALL does if it does not receive a valid 
response from the anti-spam external database.
If the ZyWALL does not receive a response within seven seconds, it sends 
the e-mail digest a second time. If the ZyWALL still does not receive a 
response after another seven seconds, it takes the action that you configure 
here. The ZyWALL also takes this action if it receives an invalid response.
Here are possible reasons that would cause the ZyWALL to take this action:
1. The ZyWALL was not able to connect to the anti-spam external database.
2. The ZyWALL connected to the anti-spam external database, but there was 
no HTTP response within seven seconds.
3. The ZyWALL received an error code from the anti-spam external database.
4. The ZyWALL received an invalid spam score (for example a number higher 
than 100).
5. The ZyWALL received an unknown response to the anti-spam query.

Tag for No Spam 
Score

Enter a message or label (up to 16 ASCII characters) to add to the mail 
subject of e-mails that it forwards if a valid spam score was not received 
within ten seconds.

Forward SMTP & 
POP3 mail with tag in 
mail subject

Select this radio button to have the ZyWALL forward mail with the tag that you 
define.

Discard SMTP mail. 
Forward POP3 mail 
with tag in mail subject

Select this radio button to have the ZyWALL discard SMTP mail. The 
ZyWALL will still forward POP3 mail with the tag that you define.

External Database 
Service Status

This read-only field displays the status of your anti-spam external database 
service registration and activation.
License Inactive displays if you have not successfully registered and 
activated the anti-spam external database service.
License Inactive and the date your subscription expired display if your 
subscription to the anti-spam external database service has expired.
License Active and the subscription expiration date display if you have 
successfully registered the ZyWALL and activated the anti-spam external 
database service.
Trial Active and the trial subscription expiration date display if you have 
successfully registered the ZyWALL and activated the anti-spam external 
database service trial subscription.

Apply

Click Apply to save your changes back to the ZyWALL.

Reset

Click Reset to begin configuring this screen afresh.

Table 89   SECURITY > ANTI-SPAM > External DB (continued)