If you recieve a mail from me telling you to join a certain group, inviting you to look at a certain webpage, or something else.... please know that I did not send it. I have a group named "chess" where I save email addresses of people I do chess stuff with. I think that I gave up my yahoo account's password by mistake to some hacking website, which sends this bad requests to you. Sorry for the inconvinience! How to stop this thing? I am thinking to delete all the contacts in the chess group.
Daniel