mailing lists

I'm probably missing something obvious...

I'm seeing an increasing number of mailing lists that have a unique
envelope from for each message.

Not all of the messages have a consistant To or Cc.

I don't own the machine that the mailing list is on, so I don't want
to whitelist the IP address.

What am I to do?


-- 
John Payne      http://sackheads.org/jpayne/    john@sackheads.org
http://sackheads.org/uce/                     Fax: +44 870 0547954
        To send me mail, use the address in the From: header