Google Message Security for Google Apps Administration Guide - Manual (Page 202)

202 Message Security for Google Apps Administration Guide
Protect proprietary information
You can use Content Manager to help prevent recipients outside your company
from receiving messages with proprietary information. For example, you could
create a content filter that scans outbound messages for references to proprietary
information, such as the code name for a new product your company is
developing. If a message contains the code name, Content Manager can
“bounce” the message back to the sender, along with a message stating that the
message violates your email policy.
Allow certain content to bypass spam filters
You can use Content Manager to assure that no incoming resumes are ever
quarantined, regardless of spam-like message content. For example, you could
create a content filter that looks for the word “resume” in the subject or body of the
message and allows messages that contain that word to bypass the spam filters.
Temporarily stop junk mail
If you experience severe problems with specific junk messages, you can create a
content filter to block these messages. However, take caution when creating such
filters, because they may increase the chances of blocking legitimate messages.
For details, see “How to Use Content Manager in a Spam Outbreak” on page 233.
Important: In general, use Content Manager for enforcing company content
policies, not for filtering spam.
How Content Manager Works
Content Manager works with the junk, virus, and attachment filters of your
message security service to provide you with additional control and protection of
your email.
Where Content Filters Apply
Content Manager is an organization-level feature. Therefore, content filters apply
only to the user accounts in the user organization in which you create those filters.
If you want a content filter to apply to all users on your message security service,
ensure that you create the same filter in all the user organizations in your
organization hierarchy. For details about organization hierarchies, see
“ Organization Management” on page 35.