I've readded everyone to the new mailman3 hosted environment. There are a few changes to how message headers are presented etc as a result of the move to mailman3. 

If you want to change your subscription etc then head to https://codify.mailman3.com. 

I am not going to continue keeping the old archives at http://prdlxvm0001.codify.net/mailman and will bin that server as soon as I've removed the other lists from it that no one uses any more.