There is a difference between what the Probe() parameter of Auto-Delete=
does and what the ",Probe" parameter of Renewal= does.

* Renewal= interval,Probe

  This turns on <active> probing.  Active probing means that when the
  renewal interval is reached, a probe is sent out <instead> of the old
  renewal confirmation request (that had to be answered with CONFIRM
  listname).  Active probing causes the PROBE1 mail template to be sent
  out (and if that probe bounces, PROBE2 is sent).

* Auto-Delete= ...,Probe(nnn)

  This turns on <passive> probing.  Passive probing means that LISTSERV
  will turn a percentage of regular postings to the list into "silent"
  probes.  If Probe(30) then LISTSERV will, over a period of 30 days,
  probe everyone on the list (ie it will probe 1/30 of the membership
  per day).  If the passive probe fails then LISTSERV sends out PROBE2
  each day (for the number of days in Delay() -- except when Delay(0)
  is coded, in which case the user is deleted immediately and no probe
  is sent).

As you see there is a difference between the two.  You can in fact have
passive probing turned on without needing a Renewal= setting at all, and
vice versa.

Nathan