This is how to send yourself an email to the past.
1-You have to create a nested torsion field (this is what accesses the specific time destination).
2-Place this nested torsion field (also can be called a timefield) where a computer placed within it can access an internet connected router (wireless) at that target time destination. (You, of course, have to have the access credentials to connect.)
3-Make your email message, disconnect from your present day internet connection. Press send then shut delete your current internet connection credentials. Add the target time destination internet connection credentials. Shut down.
4-Place computer within the nested torsion field before you power it up.
5-Power up the computer.
6-Power up the timefield. When the computer accesses the internet at the target time destination it will automatically send (as long as the email used to send has the proper email account settings/credentials).