Google Message Security for Google Apps Administration Guide - Manual (Page 209)

Content Manager 209
Create or Edit a Content Manager Filter
A content filter can contain up to three content rules and a message disposition
(what Content Manager does with the captured message). A rule specifies the
following:
• The content to scan for: The content, or rule value, can be an exact word,
phrase, or string of characters. Or, it can be a text pattern in the form of a
regular expression. For more information, see “About Using Regular
Expressions” on page 218.
• The location to scan: Message locations include the subject line, sender,
recipient, body text, or header—or the entire message, including attachments.
• The type of filter to use: A filter type specifies how the filter scans for
content—for example, a filter can look for an a exact match of a word or
phrase, or it can look for any text that begins with a specific string of
characters.
Tip: After you create or edit a content filter, you can apply your changes to all
suborganizations. For details, see “Configure Content Manager” on page 207.
To create a content filter:
1. Go to the Content Manager filter-list page for the organization that contains
the users whose messages you want to filter. For details, see “View Content
Manager Filters and Policies” on page 206.
2. Ensure that Content Filtering is On. For details about turning on Content
Manager, see “Configure Content Manager” on page 207.
3. Click the Add Custom Filter link.