Received from Charlie McB at 10/30/2018 04:10 PM UTC:
Before I submit a suggestion to beta, can you help me imagine a reason why it might be a bad idea for an owner to have at least view access to a subscriber's Email Alias information? I realize that an Email Alias is part of an individual's personal Groups.io profile, and (unlike Display Name, for example) is not associated with a specific group. However, it seems reasonable that an owner should be able to know about an email address --
other than a member's original subscription address -- that can post messages to the group.
Why do you think you need this information? Why can't you just ask the user? He forgot? Too bad for him because the workaround you're requesting would violate the trust of thousands of other users.
There's a setting that allows a user to keep his profile info private. To give even a group owner access to info the user has been told will be kept private is a violation of trust. And - totally unencumbered by any facts - I'd GUESS it's a GDPR issue. You just don't give a user a setting that is said to make something private and then create a back door into that info that violates that original understanding. Not good even if there were no GDPR to consider.
Jim H