ZyXEL Communications 100 Series, 200 Series manual 566

Chapter 33 Anti-Spam

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 425 Anti-X > Anti-Spam > Black/White List > Black List (or White List) > Add

The following table describes the labels in this screen.

Table 180 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	This field displays when you select the Subject type. Enter up to 63 ASCII
Keyword	characters of text to check for in e-mail headers. Spaces are not allowed, although
	you could substitute a question mark (?). See Section 33.4.2 on page 567 for more
	details.
Sender or Mail	This field displays when you select the IP type. Enter an IP address in dotted
Relay IP Address	decimal notation.
Netmask	This field displays when you select the IP type. Enter the subnet mask here, if
	applicable.
Sender E-Mail	This field displays when you select the E-Mailtype. Enter a keyword (up to 63
Address	ASCII characters). See Section 33.4.2 on page 567 for more details.
Mail Header Field	This field displays when you select the Mail Header type.
Name	Type the name part of an e-mail header (the part that comes before the colon).
	Use up to 63 ASCII characters.
	For example, if you want the entry to check the “Received:” header for a specific
	mail server’s domain, enter “Received” here.
Field Value	This field displays when you select the Mail Header type.
Keyword	Type the value part of an e-mail header (the part that comes after the colon). Use
	up to 63 ASCII characters.
	For example, if you want the entry to check the “Received:” header for a specific
	mail server’s domain, enter the mail server’s domain here.
	See Section 33.4.2 on page 567 for more details.

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	ZyWALL USG 100/200 Series User’s Guide