ZyXEL Communications 70 Series - Manual (Page 276)

ZyWALL 5/35/70 Series User’s Guide
Chapter 15 Anti-Spam 276
The following table describes the labels in this screen.
Table 88 Anti-Spam Rule Edit
LABEL DESCRIPTION
Rule Edit
Active Turn this entry on to have the ZyWALL use it as part of the whitelist or blacklist. You
must also turn on the use of the corresponding list (in the Anti-Spam
Customization screen) and the anti-spam feature (in the Anti-Spam General
screen).
Type Use this field to base the entry on the e-mail’s source IP address, source e-mail
address or an MIME header.
Select IP to have the ZyWALL check e-mail for a specific source IP address.
You can create whitelist IP address entries for e-mail servers on your LAN or DMZ
to speed up the ZyWALL’s processing of your outgoing e-mail.
Select E-Mail to have the ZyWALL check e-mail for a specific source e-mail
address or domain name.
You can create a whitelist entry for your company’s domain name (or e-mail
accounts) to speed up the ZyWALL’s processing of e-mail sent by your company’s
employees.
Select MIME Header to have the ZyWALL check e-mail for specific MIME headers
or values.
Configure blacklist MIME header entries to check for e-mail from bulk mail
programs or that have content that are commonly used in spam. You can also
configure whitelist MIME header entries to allow certain MIME headers or values
that identify the e-mail as being from a trusted source.
IP Address This field displays when you select the IP type. Enter an IP address in dotted
decimal notation.
IP Subnet Mask This field displays when you select the IP type. Enter the subnet mask here, if
applicable.
E-Mail Address This field displays when you select the E-Mail type. Enter an e-mail address or
domain name (up to 63 ASCII characters).
You can enter an individual e-mail address like [email protected].
If you enter a domain name, the ZyWALL searches the source e-mail address
string after the “@” symbol to see if it matches the domain name.
For example, you configure a entry with “def.com” as the domain name:
E-mails sent from def.com e-mail addresses such as [email protected] match the
entry.
E-mails sent from mail.def.com, such as [email protected] do not match the entry
since “mail.def.com” does not match “def.com”.
Header This field displays when you select the MIME Header type.
Type the header part of an MIME header (up to 63 ASCII characters).
In an MIME header, the header is the part that comes before the colon (:).
For example, if you want the whitelist or blacklist entry to check for the MIME
header “X-MSMail-Priority: Normal”, enter “X-MSMail-Priority” here as the MIME
header.
Value This field displays when you select the MIME Header type.
Type the value part of an MIME header (up to 63 ASCII characters).
In an MIME header, the part that comes after the colon is the value.
For example, if you want the whitelist or blacklist entry to check for the MIME
header “X-MSMail-Priority: Normal”, enter “Normal” here as the MIME value.