What causes #ygrp code to appear at the bottom of an email?

Question

One of the members in a Yahoo Group I belong to always has about 45 lines of a mysterious code with #ygrp at the start of each line at the bottom of the messages that I receive from her in a daily digest. She wants to get rid of it but does not know what it means or why it is there. Can anyone answer these questions and additionally how to stop it happening? It does not happen with anyone else's messages.

Answer 1

it's a secret message from siberia asking everyone to start planting trees so that  maybe we can pause global warming for one sec... imagine if the whole 7 billion of us planting trees... we have 7 billion sec extra before the earth explodes...