Spam filtering for list owner?
Spammers have apparently discovered they can spam FOO-owner@domain by sending mail forged "from" FOO-owner@domain. In the past few weeks I have begun receiving increasing amounts of spam via this channel.
I can't use the spam filtering features of my host's mail package, because the mail ID FOO-owner does not actually exist anywhere. It seems to be virtualized on the fly by the host due to some feature of Mailman, and forwarded to the addresses listed in the configuration as list administrators.
There are many spam controls in Mailman, but they are oriented around postings. None allow control of mail sent to the list owner. I would like to be able to state simply that FOO-owner should reject mail from FOO-owner (we can safely do this because we never send such mail), but I can't seem to do that.
I am using Mailman 2.1.11.cp3 in CPanel version 11.24.4-RELEASE 35075.