I too have fallen victim to the mysterious anon messages. I however get a bounce indicating that my password is wrong. I suspect the following: Somehow someone on the list is asking the list to forward to a penet.fi blind account (anXXXX). Everytime cypherpunks sends a message to this account, the penet site tries to either assign or verify the password on the senders alias. In my case, as I have a long unused account on penet, is this: Message 2: