I'm afraid you have lost me Mark.  What is probe processing?
 
At 07:47 PM 1/9/97 -0600, you wrote:
>You might want to consider implementing renewal processing for your list.
>Unless trekdog/dogtrek is also receiving mail on another address and can
>reply with the original subscription address to a renewal request, s/he
>should be pruned off.  If your list server is at 1.8c (or the right build
>of 1.8b), probe processing would be even more effective.
>
>Mark R. Williamson
>
>