date sent does show as a good cross reference point. PLUS listing by date is a decent way to show that blocks of emails aren't missing basically the time stamp

date sent does show as a good cross reference point. PLUS listing by date is a decent way to show that blocks of emails aren't missing basically the time stamp accounts for his whereabouts on any given day. That's what people look for. If there's a big issue and it's known that it was in the media on x date. Then people could take a look at all that correspondence and see what and who he was talking to.