How do I find out which of my group members are registered at Grouply?

Question

There's been quite a buzz about Grouply and I've been asked how to tell if any of your group members belongs to Grouply, so they can be banned for security reasons.

Answer 1

There is no way to tell.  Grouply makes no changes to a user's group settings unless that ask it to, or unless a user decides to announce they use Grouply.  This new feature was requested by users in the interests of security.

Answer 2

again, grouply is just like incredimail. members of grouply aren't accessing anything they couldn't anyway, nor can other people access their grouply account.

however, if members  are using the grouply mail thingy, some will opt to change their ID's and it'll end with grouply.com, but those who choose not to, you'll never know.