Google Message Security for Google Apps Administration Guide - Manual (Page 258)

258 Message Security for Google Apps Administration Guide
Industry Heuristics and the Blocked Sender List
If an organization has Industry Heuristics turned on, a message containing
industry content coming from a Blocked Sender is still quarantined. The industry-
specific content disposition is set after the Approved/Blocked Senders disposition
is set and processed.
You may consider adding an address from user’s list to the appropriate
organization-level list to improve filtering for all users, while freeing up space for
that particular user.
When Sender Lists Apply
Sender lists are evaluated before spam filtering, but after virus blocking and other
filters. As a result:
• Users can’t receive viruses or email attacks from approved senders
If a message from an approved sender contains a virus or is part of an email
attack, it is stopped by virus blocking or Connection Manager, and does not
reach users.
• Messages from approved senders are not quarantined as spam
If a message from an approved sender is tagged as spam, the message is still
sent to the recipient.
• Approved senders can optionally bypass Attachment Manager and
Content Manager filters
Depending on your organization’s email policy, you can optionally deliver
messages from approved senders if they contain prohibited attachments or
content. See “Configure Attachment Manager” on page 275 and “Create or
Edit a Content Manager Filter” on page 209.
Organization and User Sender Lists
An organization-level list applies to all users in that organization; entries in that list
are not visible to users in the organization. A user-level list applies only to that
user.
The user’s list takes precedence over the organization-level list. For example, if a
sender is blocked at the org level but approved at the user level, then that
sender’s messages bypass spam filters and are delivered to the user’s inbox.
Administrators access organization-level and user-level lists through the
Administration Console. Users access their own lists through the Message
Center.
Changes to approved- and blocked-sender lists take effect within seconds.
You can opt to propagate your org-level settings to sub-orgs. See “Propagation for
Approved/Blocked Sender Lists” on page 260 for details.