ZyXEL Vantage CNM User Guide - 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 DESCRIPTION External Database Enable External Database 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. Spam Threshold 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 email as spam, but may allow more spam to get through. 168 Vantage CNM User's Guide