Google Message Security for Google Apps Administration Guide - Manual (Page 349)

Reports 349
The following logs are available:
TLS Reports
TLS (Transport Layer Security) is an optional feature; whether the TLS Reports
are displayed depends on your product configuration.
TLS by Domain/Account (Inbound)
By domain or account, the total number and size of messages that passed
through the message security service, and the number, size, and percent of
messages transmitted by TLS.
Two types of inbound TLS 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 TLS 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
Log Description
Daily Log Data for the most-recent 24-hour period for the
selected org.
Daily Log - includes
sub-orgs Data for the most-recent 24-hour period for the
selected org and its sub-orgs.
Weekly Log Data for the most-recent 7-day period for the
selected org.
Weekly Log - includes
sub-orgs Data for the most-recent 7-day period for the
selected org and its sub-orgs.
Field Description
Domain/Account Domain or recipient address to which messages
were sent.
Total Messages Total number of messages archived.
Total Bytes Total size of messages archived.
Field Description
Domain (domain
report) The recipient’s domain (inbound).
Recipient
(account report) The recipient’s address.