I've just submitted a PR which changes the link we provide for the web
archiving of our mpl mailing lists (
https://github.com/matplotlib/matplotlib/pull/1540) as it appears that the
sourceforge archiving stopped updating in July...
Given that the mailinglists are provided/hosted by sourceforge in the first
place, I find it concerning that the sourceforge archiving is in this
state. Their addition of advertising on our mailinglist posts makes me even
less enamoured with the service we receive.
It makes me wonder whether we should consider alternative service providers
for our mailing lists? I notice the ipython/numpy/scipy mailinglists are
all hosted via scipy.org and wonder if we should consider asking to have
our mpl mailinglists hosted there too?