Google Message Security for Google Apps Administration Guide - Manual (Page 330)

330 Message Security for Google Apps Administration Guide
Spam Reports
Spam Reports give a list of the domains that are sending spam, the users
receiving spam, and provide detailed information on the most active spam filters.
Spam by Domain (Inbound)
This report shows spam messages quarantined for each domain in the selected
organization.
Two types of inbound Spam by Domain reports are available. One report
aggregates all messages for sub-domains and aliased domains to the primary
domain. A second type of report -- the Spam by Domain (& sub-domains) report
-- includes all sub-domains and domain aliases exactly as they were received
without any mapping to a primary domain. The fields in these two reports are
identical, and each report has the same total emails processed.
Field Description
Domain Domain to which messages were sent.
Spam Number of spam messages quarantined.
Spam Bytes Total size of quarantined spam messages.
Bulk Mail General category for junk email filtering (may include
characteristics of the other specific filter categories).
Special Offer Number of messages triggering the Special Offer
junk email filter.
Get Rich Quick Number of messages triggering the Get Rich Quick
junk email filter.
Sexually Explicit Number of messages triggering the Sexually Explicit
junk email filter.
Racially Insensitive Number of messages triggering the Racially
Insensitive junk email filter.
Blatant Spam Blocking Number of messages blocked as obvious spam by
Blatant Spam Blocking.
Blocked Sender Messages quarantined because the specific sender
address was listed in either the user or org-level
Blocked Senders list.
Blocked Server Messages quarantined because the domain was
listed in a Blocked Senders list, not a specific
address.