Google Message Security for Google Apps Administration Guide - Manual (Page 247)

Content Manager 247
Value Enter the content for which you want Content Manager to
scan messages.
If you selected a filter type of starts with, ends with,
contains text, does not contain, equals, or matches any
word in:
• The value must be a word or phrase. You can enter a
regular expression only if you select a filter type of
matches regex or does not match regex.
• Enter a space-separated list of ASCII characters (for
example: one two three).
• The value is not case sensitive—that is, text in
messages can match the value regardless of case.
• The number of characters you can enter is not strictly
limited. However, there is a character limit for all filters
in an organization combined. For details, see “Content
Filter Limitations” on page 205.
If you selected a filter type of matches regex or does not
match regex:
• The value can be a regular expression. Use regular
expressions to scan messages for text patterns rather
than specific words or phrases.
• For the special characters and construction rules you
can use to create a regular expression, and examples
of regular expressions, see “About Using Regular
Expressions” on page 218.
Use this field... To...