Zyxel-communications 70 Series Uživatelský manuál stáhnout pdf (Strana 272)

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101

ZyWALL 5/35/70 Series User’s Guide

Chapter 15 Anti-Spam 272

Figure 126 Anti-Spam: External DB

The following table describes the labels in this screen.

Table 86 Anti-Spam: External DB

LABEL DESCRIPTION

External Database

Enable External

Database

Enable the anti-spam external database feature to have the ZyWALL 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 ZyWALL.

Spam Threshold 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 score threshold (from 0 to 100) for considering an e-mail to be

spam. The ZyWALL classifies any e-mail with a spam score at or below the

spam threshold as not being spam and any e-mail with a spam score higher

than the spam threshold as being spam.

A lower spam threshold catches more spam e-mails, but may also classify

more legitimate e-mail as spam.

A higher spam threshold lessens the chance of classifying legitimate e-mail as

spam, but may allow more spam to get through.

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