ZyXEL Communications 200 Series - Manual (Page 567)

Chapter 33 Anti-Spam
ZyWALL USG 100/200 Series User’s Guide
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33.4.2 Regular Expressions in Black or White List Entries
The following applies for a black or white list entry based on an e-mail subject, e-mail address,
or e-mail header value.
• Use a question mark (?) to let a single character vary. For example, use “a?c” (without the
quotation marks) to specify abc, acc and so on.
• You can also use a wildcard (*). For example, if you configure *def.com, any e-mail
address that ends in def.com matches. So “mail.def.com” matches.
• The wildcard can be anywhere in the text string and you can use more than one wildcard.
You cannot use two wildcards side by side, there must be other characters between them.
• The ZyWALL checks the first header with the name you specified in the entry. So if the e-
mail has more than one “Received” header, the ZyWALL checks the first one.
33.5 The Anti-Spam White List Screen
Click Anti-X > Anti-Spam > Black/White List and then the White List tab to display the
Anti-Spam White List screen.
Configure the white list to identify legitimate e-mail. You can create white list entries based on
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 or specific subject text.
Figure 426 Anti-X > Anti-Spam > Black/White List > White List
The following table describes the labels in this screen.
OK Click OK to save your changes.
Cancel Click Cancel to exit this screen without saving your changes.
Table 180 Anti-X > Anti-Spam > Black/White List > Black List (or White List) > Add
LABEL DESCRIPTION
Table 181 Anti-X > Anti-Spam > Black/White List > White List
LABEL DESCRIPTION
General Settings
Enable White List
Checking Select this check box to have the ZyWALL forward e-mail that matches (an
active) white list entry without doing any more anti-spam checking on that
individual e-mail.