[NANOG] List admin: filter old address?

[Chris Adams via NANOG <nanog () lists nanog org>]

There seem to be a number of replies that CC both the old and new list
address, resulting in multiple copies of lots of messages.  I can filter
them at my end, but it'd be better to address that at the list server.

-- 
Chris Adams <cma () cmadams net>
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