Exchange 2010 Powershell

Use to find messages sent TO any users at a domain ,  domain.com

Get-MessageTrackingLog -ResultSize Unlimited -Start "04/1/2014" -End "12/29/2014" | where{$_.recipients -like "*@domain.com"} | select-object Timestamp,SourceContext,Source,EventId,MessageSubject,Sender,{$_.Recipients} | export-csv C:\ExchangeLogResults.txt

Use to find messages RECEIVED from a domain, domain.com

Get-MessageTrackingLog -ResultSize Unlimited -Start "04/1/2014" -End "12/29/2014" | where{$_.sender -like "*@domain.com"} | select-object Timestamp,SourceContext,Source,EventId,MessageSubject,Sender,{$_.Recipients} | export-csv C:\ExchangeLogResults.txt