This list used to be configured so that posts from addresses that weren't subscribed to the list would be held for moderation, and if I got to it fast enough, I would allow through messages that weren't spam.
So much spam goes to the list posting address now that I've configured the list server to simply reject posts from non-subscribed email addresses, because it was just too much work to go through the dozen spams per day just in case someone tried to make a legitimate post from an address other than the one they were subscribed from. Unfortunately, there appears to be no straightforward way to change the message that goes out when messages from non-subscribed addresses are rejected. Right now it just says you're not allowed to post. This is a deficiency in Mailman that I aim to have corrected, since it *does* allow the admin to control what's sent to list subscribers when *their* messages are rejected. So for now I'll just tell you up front: if you attempt to post from an address other than the one you've subscribed from, your message will be rejected. The solution is to either post from the address from which you're subscribed, change your subscription address at <http://lists.erps.org/mailman/listinfo/erps-list>, or subscribe a second time with the second address and set your list options to "no mail" so you don't get two copies of every post. I'm sorry it has to be this way because I would really like for it to be as convenient as possible for people to post to the list. However, this is the best solution I can think of given the current volume of spam. SpamAssassin and its ilk have the problem of both false negatives *and* false positives, so we'd have the problem of spam leaking into the list (which, to my knowledge, has never happened to date) and people's having their messages rejected even if they didn't change their posting address. Whitelisting subscribers would eliminate the false positive problem, but we'd still be stuck with some spam making it to the list. Even with the auto-reject solution, there's also the problem of Mailman's sending replies to forged spam addresses, which means if someone is joe-jobbed, I'm just adding to the volume of mail they have to deal with. The only solution I can think of to *this* problem is to reject messages from non-subscribed addresses at SMTP time, but that's even more anti-social to the subscribers who are simply posting from a different address. Eventually, spammers will start subscribing to this list (as they do with Yahoo groups now) for the purpose of spamming it, at which point I'm going to need to figure out another solution. At least the current mailing list archives obscure email addresses, so your addresses aren't being harvested from there, though a specialized harvester could probably get them from Gmane.
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