futureme should add an option to send to many emails.
What I mean is there should be an option to send many email addresses at a time so I could send one future letter to many people without having to do much work.
Istomin Nikita commented
try another service: https://www.to-be.today
there you can send letter to 2 addresses: your and friend. Of course you can put instead firend's email your second email.
Or you can send email to the unknown person.
Complete agreement. Just last month I had to copy-paste this long email some 10 times.