This group is the granddaddy of all geocaching mailing lists, going back to the very first days of the hobby.
There are 760 people subscribed to this group. How many of those email addresses are still working? The owner of the group could tell us how many bouncing addresses there are out of those 760.
And how many of the still-working addresses are being read by people who are still geocaching?
And, finally, who has the greatest seniority on this list? Reply with the post number of one of your early posts to be in the running.