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Is there a way to, once a user is signed-in, to offer a button that would automatically include them in a user group?
What I am trying to do is allow someone to send emails to interested parties. This would be accomplished using the "mail users" function sending an email to this particular user group. I do not want to be in the business of manually inputting users into the groups.
It would be perfect if I could have an "opt-out" link on the email, but it is not critical.
Has anyone ever made something like this or heard of something like this? Any help would be appreciated.
-Matt