tde-users is currently the main source of the spam I receive. In fact, all the spam in my Junk folder at the moment came from tde-users.
Slavek, is it possible with this mailing list software to do the suggestion I made a couple months ago? That is, have new users set to "Moderated" until they've made a legitimate post. That's been 100% effective at eliminating spam on mailing lists I've managed.