ZyXEL Communications Vantage CNM 2.3 User Manual page 168

Chapter 6 Device Security Settings
score is received. You must register for this service before you can use it (see the
chapter on registration for details).
Figure 66 Device Operation > Device Configuration > Security > Anti-Spam >
External DB
The following table describes the labels in this screen.
Table 58 Device Operation > Device Configuration > Security > Anti-Spam >
External DB
LABEL
External Database
Enable External
Database
Spam Threshold
168
DESCRIPTION
Enable the anti-spam external database feature to have the device
calculate a digest of an e-mail and send it to an anti-spam external
database.
The anti-spam external database sends a spam score for the e-mail
back to the device.
The anti-spam external database checks an e-mail's digest and
sends back a score that rates how likely the e-mail is to be spam.
The possible range for the spam score is 0~100. The closer the
score is to 100, the more likely the e-mail is to be spam.
Set the spam threshold (from 0 to 100) for considering an e-mail to
be spam. The device classifies any e-mail with a spam score greater
than or equal to the threshold as spam. It classifies any e-mail with
a spam score less than the threshold as not being spam.
A lower threshold catches more spam e-mails, but may also classify
more legitimate e-mail as spam.
A higher threshold lessens the chance of classifying legitimate e-
mail as spam, but may allow more spam to get through.
Vantage CNM User's Guide