Every once in a while I post tutorials on how to use features of Groups.io that can make your life much easier. In this case, it's when you want to change the e-mail address associated with your Groups.io account. If you're subscribed to only one or two Groups.io groups, then the old unsubscribe-resubscribe method using the new address is fine, but if you're subscribed to many groups this gets old, fast. It also means that you will end up being put back on first message moderated status for all those groups where you unsubscribed and resubscribed, because Groups.io has no idea that this is a change for an existing user, and treats you as a brand new user of Groups.io.
If you want to change the e-mail address associated with your Groups.io Account, and by extension that means for all the groups you've subscribed to using that address, then try these instructions after you download and review them:
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
If you think that you can think about a thing, inextricably attached to something else, without thinking of the thing it is attached to, then you have a legal mind.
~ Thomas Reed Powell