Fortinet FortiGate 100, Administration Manual

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01-28006-0003-20041105 Fortinet Inc.
Banned word list Spam filter
2 Select Create New.
Figure 177:Adding a MIME header
3 Enter the MIME header key.
4 Enter the MIME header value.
5 Select a pattern type for the list entry.
6 Select the action to take on email with that MIME header key-value.
7 Select OK.
Banned word
Control spam by blocking email containing specific words or patterns. The FortiGate
unit searches for banned words in email messages. If a match is found, the
corresponding protection profile action is taken. If no match is found, the email is
passed to the recipient.
You can use Perl regular expressions or wildcards to add banned word patterns to the
list. See
“Using Perl regular expressions” on page 346 .
This section describes:
• Banned word list
• Banned word options
• Configuring the banned word list
Banned word list
You can add one or more banned words to sort email containing those words in the
email subject, body, or both.
Words can be marked as spam or clear. Banned words can be one word or a phrase
up to 127 characters long.
If you enter a single word, the FortiGate unit blocks all email that contain that word. If
you enter a phrase, the FortiGate unit blocks all email containing the exact phrase. To
block any word in a phrase, use Perl regular expressions. See
“Using Perl regular
expressions” on page 346 .
Note: Perl regular expression patterns are case sensitive for Spam Filter banned words. To
make a word or phrase case insensitive, use the regular expression
/i
. For example,
/bad language/i
will block all instances of
bad language
regardless of case. Wildcard
patterns are not case sensitive.