Why Can't I Just Send Myself an Email from the Future?

Imagine you have a magical box that lets you send messages to yourself, but the message arrives before you sent it. It’s like sending your future self an email from today, and when you read it tomorrow, you already knew what was going to happen. Time travel email works the same way: if you could send an email from a future date back to the present, you might get a message telling you something that hasn’t happened yet. That’s like knowing your own future before it happens.