Hi Barb!
I'm so sorry to read, that you are still having a problem with this issue.
"The only detail that I can imagine to have contributed to this mess is that one of the email addresses listed is no longer valid..."
Is this address, listed in
My Info?
If so, have you tried deleting that info there, to see if that corrects it?
Also, is it possible that at one time, you created an additional
Discussions ID, that may be subscribed to a
Category or
Forum, and the
Email Subscription Notifications, are actually being generated by that account?
Open one of the Emails, and see what the name is after
Dear
Is the name here, the account you are now using?
Also read the full
Header, and see if you can spot a clue.
Look for
Your Name,
Your Discussions Log-In ID, and
Your Email Address.
ali b