about changing groups to nomail

[Betty Landers]

It's actually easier than going to each individual group's site.  go to http://groups.yahoo.com/mygroups.  Click on "edit my groups."  There you'll see a bunch of combo boxes.  You can either do it with each individual group or you can go down to the bottom where it says "set all of the above to:".  If you have more than 1 page of groups, you'll have to go to each page, which you can do from the "edit my groups page", and click edit my groups again once you're on the next page.  Hope I didn't confuse you too much.
Betty
"Bad news, Harry. I've just been to see Professor McGonagall
about the Firebolt. She -- er -- got a bit shirty with me. Told me
I'd got my priorities wrong. Seemed to think I cared more about
winning the Cup than I do about you staying alive. Just because I
told her I didn't care if it threw you off, as long as you caught
the Snitch first." Wood shook his head in disbelief. "Honestly,
the way she was yelling at me... you'd think I'd said something
terrible..." 
Oliver Wood, Harry Potter and the Prisoner of Azkaban Ch. 12