I'm going off of memory here, but I think this should do it. Test
before using in production.
I would like to have the qmail configurated to
FORWARD/DUPLICATE EVERY incoming message (no matter whoever
the receiver) to two different host behind. (Both hosts are
not linux machines
man qmail-remote.
but basically, if you create a stmproutes files in /qmail/control with the
relevent info, it will do what you have requested
something like :
production.domain.com:hosta.domain.com
development.domain.com:hostb.domain.com
of course, hosta/b have to have the appropriate A