howdy tilde-friends,
since i upgraded tilde.team to ubuntu 20.04, there have been some issues[1] with our mailman setup here on lists.t.o. i upgraded mailman last night to the current stable release directly from upstream instead of using the distro packages.
everything should be up and running now. please respond here on the list or on irc if you run into any trouble!
cheers, ~ben
[1]: https://bugs.launchpad.net/ubuntu/+source/mailman3/+bug/1877701