How do I stop receiving e-mails from a group? Have already removed myself?

I removed myself from a group over a week ago and still get numerous e-mails from that group. I then tried to go back in and see if I had done it correctly, would not allow me access. I then closed my Yahoo account. Still getting the group messages. The group moderator said she would see what the problem was, but has not answered my recent e-mails. I just today created a new Yahoo account so I can find out what to do about this! Thanks for any help.