Future Me

Send an email to the future. My first thought was: "they are harvesting email addresses!" They anticipate that reaction in the FAQs:

is this all a front by some corporation to collect e-mail addresses for spamming purposes?

no, your email address is kept strictly confidential and will ONLY be used for the purpose of you sending an email to your future self. so relax. and maybe remind your future self to relax as well.

Well, that doesn't mean they aren't doing it, but at least they thought to reassure us.

Thanks to Rocketboom for the tip.