Can we monitor mail flow using SAM like form which source mail ID to destination mail ID ? With other metrics like how much mail size and type of attachment. Am looking something like NTA monitoring in exchange server.
Out of the box, not that I'm aware of. You would probably need to build out some kind of Windows PowerShell Monitor or Windows Script Monitor to get the data you are looking for. That would probably be a bit limited on how you would present that data though.
Going a bit more abstract, which this would be really in theory. You could potentially rig up a Windows PowerShell process on the server to log the events to the event log and then use the Windows Event Log Monitor to build out the unique list of items on the SW view.