Yes, I realized that as soon as I saw the message ditributed by 
listserv!    The apology I sent got returned
because of a mistyped address.   Here it is again:

Suppose I set a header to:

         Auto-Delete = Yes, Manual, Delay (0), Probe (0)

Would this produce a list of addresses that are returning bounced messages, 
without actually deleting the subscriptions?

I would then return the Auto-Delate setting to what it is currently, in 
order not to undermine how the list runs normally.

Bill



>Hello,
>
>We are reviving a list we haven't used for a couple of years.     Is there 
>a way to check for active / legitimate addresses of subscribers without 
>sending out a "test" message?     I thought a probe of some kind that 
>would return a list of addresses that return a non-delivery error message 
>might do the trick, but adding "probe" to Renewal= only operates at 
>subscription renewal time, not immediately.
>
>Any advice welcome.
>
>Bill Schipper
>
>[PS:   Sorry for posting the "Query lstown-l" message;   elementary 
>mistake on my part]