Exchange 2013 Message Tracking
Message Tracking is enabled default in Exchange 2013 mailbox server. To configure message tracking Syntax
Set-TransportService
The default limits are
Individual message tracking log files is 10 MB.
Maximum size for the directory that contains the message tracking log files is 1000 MB.
Maximum age for the message tracking log files is 30 days.
To track the emails in Exchange 2013
Get-MessageTrackingLog -Start “Feb 25 2013” | Out-GridView
Get-messagetrackinglog -Start “Feb 25 2013” -ResultSize Unlimited | select-object eventid,timestamp,messageid,sender,recipients,messagesubject | out-gridview
Ref: http://technet.microsoft.com/en-us/library/bb124375%28v=exchg.150%29.aspx#Structure