I'm trying to figure out how to verify my "Canadian" members prior to the Canadian Anti-Spam Legislation enactment. I'm not sure there is any way for me to grab "all" of them without having every one of my subscribers opt-in again, but I'm first going to try with any address that ends in .ca and then do my best to find sites that use .com, etc. in Canada (I know a number of them off the top of my head!).
So, is there any way for me to force one particular member group to be "unconfirmed" and send them an email requesting that members opt in again? If so, I could put all of the Canadians in one group and send them a message requesting an opt-in.
Any idea how to best handle this?