Have you ever sent a chain letter or chain e-mail or text? best friend test sample email chain letter: this is a best friend test. send this to 10 friends as fast as you possibly can and if u get it back u truly will know who ur friends are. if u break this chain u will severely have bad luck, i'm warning you so now u get to make a free take the situation above and think about sending 10 emails and then those 10 people send 10 emails each and so on… you can see that the amount of people receiving emails starts growing extremely fast.