What about us GMane users? This method of participation is actually reccommended as perferred for all Plone lists. And no wonder imho - news is far superior to mail for participating in high traffic forums! Other posters have raised similar concerns. Unrelated - have you tried grey-listing also? http://projects.puremagic.com/greylisting/ Andrew Sawyers wrote:
A similar discussion is taking place on zope-dev and I'd like to bring that here as well. I'd like to propose that we change the Mailman policy for this list to restrict posting to subscribers only. I'm sure others will agree and others will not. Some of the recent issues I've seen are: A) I can't stop some logical extensions (.zip) which are now containing virus' from getting to the list without causing problems for those who are possibly attaching valid attachments B) We can't stop all spam - we're using 3 rbl lists to stop as much as we can; that is not good enough IMNSHO C) We can stop outside mailers from replying to the list illogically My vote is for refusing posts from non-subscriber emails.
Let the beatings begin. Andrew