You need a 1.8c manual, which you get from the same place you used to get
the 1.8b manual. :)

On Tue, 4 Feb 1997 07:53:01 -0500 Lewis Rose said:
>Thanks for the template.
>
>I can't find any references to the PROBE command
>in the manual, although I have received some
>probes as members of other listservs.
>
>Would someone be kind enough to explain how to use
>it and what kind of followup it takes?
>
>Thanks.
>
>Lew Rose