[Numpy-discussion] spam on the mailing lists

Hi All, Today both of the python.org mailing lists I'm subscribed to (numpy and scipy-dev) got the same kind of link shortener spam. I assume all the mailing lists started getting these, and that these won't go away for a while. Is there any way to prevent these, short of moderating emails from new list members? Assuming the engine even supports that. There aren't many emails, especially from new members, and I can't think of other ways that ensure no false positives in filtering. Since maintainer time is precious, I can volunteer to moderate such emails if needed. Cheers, András