If you have the capability, is there any reason not to place the subscriber email address in the To: header of list messages, particularly announcement lists? More and more spam filters are making a determination based on a simple check for your email address in the To: or Cc: line. I myself find that I can get rid of 80-90% of spam in this manner.
I can't see that much is lost when mailing list information can be placed in other headers, such as those recommended by RFC2369 (List-Help, List-Post, etc.). Omar
