I get a similar message in every mail delivery error message I receive
from Listserv:
 
The enclosed mail file, found in the  MUTEST reader and shown under the spoolid
6821  in the  console log,  has been  identified as  a possible  delivery error
notice for the following reason: mail origin is listed in "Filter=" list header
keyword (or its default value for MUTEST).
 
I do not have a Filter= keyword in any of my lists.  Is this documented
anywhere?
 
Steve Moore - [log in to unmask]