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]