J,
Shal, no need to
test it. There's no question about this.
What had me concerned was joining a group
and then seeing this:

In conjunction with a left side that had buttons only for the Home
and Subscription pages. But I subsequently realized that the test
was flawed: that address would also have been NC (it was not a
valid address).
"Bounced" just
means that groups.io stops sending emails to the address. It does
nothing at all with regard to group membership or accessibility.
Sounds good in principle, but I always
prefer to test when practical. In this case though I haven't
sufficient doubt to propel me.
Shal
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