Google Message Security for Google Apps Administration Guide - Manual (Page 347)

Reports 347
Two types of inbound Archiving 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 Archiving 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.
Archiving by Account (Inbound)
Address to which archived messages were sent, and the total number and size of
messages.
Field Description
Domain Domain to which messages were sent.
Acct Msgs Total number of messages archived for registered
users.
Acct Bytes Total size of messages archived for registered users.
Non-Acct Msgs Total number of messages archived for unregistered
users.
Messages for unregistered users are archived only
when you turn on archiving and use the “All journaled
messages” option.
Non-Acct Bytes Total size of messages archived for unregistered
users.
Messages for unregistered users are archived only
when you turn on archiving and use the “All journaled
messages” option.
Invalid Msgs Total number of archived journal messages that were
improperly formatted.
Improperly formatted journal messages are archived
only when you turn on archiving and use the “All
journaled messages” option.
Invalid Bytes Total size of archived journal messages that were
improperly formatted.
Improperly formatted journal messages are archived
only when you turn on archiving and use the “All
journaled messages” option.
Total Messages Total number of messages archived.
Total Bytes Total size of messages archived.
Field Description
Account Recipient address to which messages were sent.