The methods by which list-owners handle bounces run the gamut:
ignoring them (maybe not even receiving them), to the immediate
deletion of that user from the distribution.
 
In between, some list-owners actually pursue the reason for
the bounce and then notify some sysadmin/hostmaster related
to the bouncing site.
 
How much time (and skill) do YOU have to pursue such things?
 
(I just acquired the "bouncing rights" to a 3k+ susbscriber list ...
I just ran out of time.)
 
--  co-owner INFOSYS, TQM-L, CPARK-L, ERAPPA-L, JANITORS, LDBASE-L, et -L
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31 Shields Bldg. -- Penn State Univ -- University Park, PA 16802-1202 USA