That would be 40,000 emails just today for trade notifcations....
We already get emails for each login and hence instead of getting login notification emails, it would be better to get these trade related emails. The reason is that when I open an order, I set a price that the coin may take a long time to reach and I can't keep checking the website daily to know when the trade has been completed. It may take a week or month. If I get a notification, I would then be able to withdraw the balance.
If that's not possible, I would atleast prefer to get a weekly activity mail where I could see which orders are pending or have been completed.