Ok, yes, the e-mail was incorrect, but seriously?!

I mean, how hard is it to check again, on your own, the status of your flight?? It's not that tough to check and see that the flight was actually at the same time. Worst case you sit at the airport for an extra hour. Much better than having to go the next day, right?

To sum up, it's pretty much just as much your fault as it is Delta's. You need to have more responsibility for your own reservation.