F-SECURE ANTI-VIRUS - FOR MICROSOFT EXCHANGE Administrator's Manual page 129

Using Keywords in Content Filtering
When the content filtering is enabled, all messages are checked against
every keyword sequence that is specified in the selected list of keywords.
A keyword may contain any characters, including punctuation symbols,
spaces, and other word separators. Keywords are case insensitive.
You can use '?' character in a keyword to match any character in that
position in the keyword and '*' to match any number of characters.
Keyword examples:
example
another example
co?p?rate
another*example
To represent '?' or '*' characters themselves in keywords, use '\?' and '\*'
sequences correspondingly. To represent '\' character, use '\\'.
For example, to match the '*** SPAM ***' string, enter '\*\*\* spam \*\*\*'.
Administration with Web Console
Matches any message text or subject that
contains the word 'example'.
Matches any message text or subject that
contains the 'another example' text. Words
'another' and 'example' have to be separated
with exactly one space character.
Matches any message text or subject that
contains - for example - words 'corporate' or
'cooperate'.
Matches any message text or subject that
contains words 'another' and 'example'
separated with any number of characters. For
example, 'another example' or 'another keyword
example'.
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