On Tue, Sep 24, 2019 at 09:58 AM, I said:
You can, however, subscribe an address to both subgroups...
Important point:? Be sure to set the forwarder's subscription in the target subgroup to "No Email" if you want to avoid a dupe loop. You might be ahead of the game using a dummy account at GMail or some such to do the forwarding.
Bruce?
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The system Help is your friend.??
/static/help