The  "privacy" problem  of 1.6a  DISTRIBUTEd lists  running with  SET listname
CONCEAL has been solved as described below; the fix will be available in 1.6b.
 
Any user subscribed to a list  operating with "Mail-via= DISTRIBUTE" (or DIST1
or DIST2) having done a "SET listname CONCEAL" command to conceal his identity
from the other members  of the list is going to  have his subscription changed
as  per a  "SET listname  SHORTBSMTP" command,  unless he  had requested  full
RFC822  headers via  the  "SET listname  FULLHDR" option;  in  that case,  his
subscription will  be modified as per  a "SET listname FULLBSMTP"  command. In
both  cases,  the user  will  get  the level  of  header  detail that  he  had
requested, but his name will not appear anywhere on the header. If the list is
subsequently changed back to non-DISTRIBUTEd  mode, the headers will revert to
the  non-BSMTP type,  unless  of  course BSMTP  headers  have been  explicitly
requested.
 
In other words, SHORTHDR is treated  as SHORTBSMTP and FULLHDR as FULLBSMTP if
CONCEAL is in effect and Mail-via=  DISTRIBUTE, without the actual contents of
the user subscription entry being changed.  The QUERY command will display the
option that is  actually used (ie xxxBSMTP if concealed),  and the SET command
will display a warning if the  user tries to explicitly alter his subscription
to a type of header that is not supported for concealed users.
 
People who are not  happy with this solution should send a  flame to their own
reader, after having made sure to remove any occurence of their name or userid
from the header so as not to disclose their identity.
 
  Eric