Chapter 34 Anti-Spam

Table 167 Configuration > Anti-X > Anti-Spam > Black/White List > Black List (or White List) > Add

LABEL

DESCRIPTION

Sender or Mail

This field displays when you select the IP type. Enter an IP address in

Relay IP

dotted decimal notation.

Address

 

 

 

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

Address

to 63 ASCII characters). See Section 34.4.2 on page 574 for more

 

details.

 

 

Mail Header

This field displays when you select the Mail Header type.

Field 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 34.4.2 on page 574 for more details.

 

 

OK

Click OK to save your changes.

 

 

Cancel

Click Cancel to exit this screen without saving your changes.

 

 

34.4.2 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.

574

 

ZyWALL USG 50 User’s Guide