It was all working beautifully... then I turned on passive probing.
Now I receive hundreds of double bounces similar to the following:

  Subject: Postmaster Copy: Undelivered Mail
  To: [log in to unmask]

  <owner-listname*user**remote*-domain*[log in to unmask]>:
  unknown user: "owner-listname*user**remote*-domain*-name"

Clearly this is mail that bounced to "[log in to unmask]", and
should be returned to "[log in to unmask]" for
processing.  It only occurs for lists which use passive probing...

Can anybody shed some light on this issue??  Is this the normal
operation of passive probing, possibly using an address format that
neither I nor Postfix are familiar with?  The manual doesn't provide
many technical details in regards to the "transparent probes" that are
sent out.

On a related note, can anyone explain why my list owners can receive
thousands of delivery errors, even with "Auto-delete=Yes,Full-Auto"
set for their list?  This seems contradictory to the description of
the auto-delete setting.

Any help would be appreciated...

Jeff Schornick
Sun Microsystems
ListServ 1.8d
Postfix 20010228 (release)