After this message, I will remove the subscriber's only requirement to the list. A few remarks (and important to those who could not post to the list anymore) 1) If you know that you will be posting from a different address, you can subscribe that address to the list as well without receiving duplicate messages. All you need to do is to subscribe to the allow' list. For the devel list: echo| mail [EMAIL PROTECTED] For the users list: echo| mail [EMAIL PROTECTED] You can unsub similarly. 2) I could not block these viral messages based on subject: there were (eventually) 12 different subjects. 3) I will not authenticate based on From: or any other fields. It is insecure, and much easier to forge than envelope sender. Just consider the fact that over 20 of these messages had list subscribers in the From: line---while only 3 had subscribers as envelope sender. Mate