ZyXEL Communications Unified Security Gateway ZyWALL 300, User Manual

Page: 691 / 1156

Chapter 38 Anti-Spam
ZyWALL USG 300 User’s Guide
691
38.4.1 The Anti-Spam Black or White List Add/Edit Screen
In the anti-spam
Black List
or
White List
screen, click the
Add
icon or an
Edit
icon to display the following screen.
Use this screen to configure an anti-spam black list entry to identify spam e-mail.
You can create entries based on specific subject text, or the sender’s or relay’s IP
address or e-mail address. You can also create entries that check for particular
header fields and values.
Figure 469 Configuration > Anti-X > Anti-Spam > Black/White List > Black List (or
White List) > Add
The following table describes the labels in this screen.
Table 186 Configuration > Anti-X > Anti-Spam > Black/White List > Black List (or
White List) > Add
LABEL DESCRIPTION
Enable Rule Select this to have the ZyWALL use this entry as part of the black or
white list.
To actually use the entry, you must also turn on the use of the list in the
corresponding list screen, enable the anti-spam feature in the anti-spam
general screen, and configure an anti-spam policy to use the list.
Type Use this field to base the entry on the e-mail’s subject, source or relay
IP address, source e-mail address, or header.
Select
Subject
to have the ZyWALL check e-mail for specific content in
the subject line.
Select
IP Address
to have the ZyWALL check e-mail for a specific
source or relay IP address.
Select
E-Mail Address
to have the ZyWALL check e-mail for a specific
source e-mail address or domain name.
Select
Mail Header
to have the ZyWALL check e-mail for specific
header fields and values. Configure black list header entries to check for
e-mail from bulk mail programs or with content commonly used in
spam. Configure white list header entries to allow certain header values
that identify the e-mail as being from a trusted source.
Mail Subject
Keyword
This field displays when you select the
Subject
type. Enter up to 63
ASCII characters of text to check for in e-mail headers. Spaces are not
allowed, although you could substitute a question mark (?). See Section
38.4.2 on page 692 for more details.