You can with this website that lets you send an email now that you will receive the date you specify. I've sent one to my 50th birthday, hope Microsoft doesn't close Hotmail before that. I wanted to show what I sent but the website won't let you see what you wrote. For some reason I almost cried while writing it, I guess I'm too melancholic to talk to my 2037 self. What would you say to the future you?
DEAR FUTURE ME, SORRY ABOUT THE SMOKING, NOT EATING GOOD, NOT EXERCISING AND NOT MAKING YOU RICH
PS: Imagine my face when I'm 50 and I receive the mail I sent HAHA.
☛ Thanks Electro^Plankton.