Because of this, recipients of such letters are generally advised to ignore the letter and destroy it.
Chain letters are capable of evolution, generally improving their ability to convince their hosts to replicate them over time. This sometimes occurs through deliberate modification of the chain letter by a recipient, or sometimes through purely accidental imperfect copying (mutation).
With the development of e-mail and the Internet, chain letters have become much more common and quick to spread than when they were transmitted purely by physical mail. But there have been Himmelsbriefen ("Letters from heaven") since at least the Middle Ages.
See also
make money fast, Amish Friendship Bread (a culinary version of a chain letter).
External link & References