[Mailman-Users] Unsubscribe after just one hard bounce

[Edward Salm, PhD]

I am creating an annual, announce-only list with over 1300 members. This is
for a once-a-year community event where people have asked/signed up to be
informed. Many of the email addresses were collected at the previous event
one year ago (or more), and I expect many to be no longer effective.

I have set the bounce_score_threshold to 1.0. However, since this list will
only be used once a year, those bounces would not be unsubscribed for 3
years!

How can I have mailman unsubscribe, not just nomail, after just one hard
bounce?

(Yes, I have searched the archives.)

Thank you!