On 26-Dec-20 4:17 PM, Donald Hellen wrote:

I just mention this so others know there's a whole 'nother world out
there on the internet. Groups.io came along a long time after the wild
west days of the internet.
Donald

Mark set up the predecessor of Groups.io in 1998, having been using email lists since 1989 :

https://wingedpig.com/category/onelist/

As you say, a good few years after Usenet, but still a pioneer of modern email list software.

--
Bill