Google Message Security for Google Apps Administration Guide - Manual (Page 345)

Reports 345
The following logs are available:
The logs show data from 20 minutes prior. The timestamps are in GMT. The log
contains a maximum of 5,000 lines of data (lines are tab-delimited). Once the size
limit is reached, logging continues, with the oldest data deleted first.
Message Encryption Reports
Message Encryption is an optional feature; whether the Message Encryption
Reports are displayed depends on your product configuration.
Message Encryption by Domain/Account (Outbound)
The domain from which messages were sent, and the number and size of
messages encrypted and relayed.
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 (domain report) Domain from which messages were sent.
Sender (account report) Address from which messages were sent.
Account (account
report) Whether the sender has an account in the message
service (Y or N).
Msgs Encrypted and
Relayed Number of messages encrypted and relayed from
each domain/sender.
% Msgs Encrypted and
Relayed Percent of messages encrypted and relayed from
each domain/sender.
Bytes Encrypted and
Relayed Number of bytes encrypted and relayed from each
domain/sender.
% Bytes Encrypted and
Relayed Percent of bytes encrypted and relayed from each
domain/sender.
Total Msgs Processed Total number of messages processed.