Regular Expressions In Black Or White List Entries; The Anti-Spam White List Screen - ZyXEL Communications ZyWall USG 2000 User Manual

Chapter 35 Anti-Spam
Table 171 Anti-X > Anti-Spam > Black/White List > Black List (or White List) > Add
LABEL
Mail Header
Field Name
Field Value
Keyword
OK
Cancel

35.4.2 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.

35.5 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
584
DESCRIPTION
This field displays when you select the Mail Header type.
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.
This field displays when you select the Mail Header type.
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 35.4.2 on page 584
Click OK to save your changes.
Click Cancel to exit this screen without saving your changes.
for more details.
ZyWALL USG 2000 User's Guide