Forward/Duplicate messages to hosts behind

[Andy WONG]

Hello,

First please forgive my ignorance of qmail's world. I'm not familiar in qmail (just 
heard it's good and get installed) but I need to setup a mail hub in a hurry. Any 
advise are welcome.

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 and one host is for production while the another is for 
development/migration)



                       +----------+                  + ----------+
                       |          |                  |           |
--incoming message --> |  qmail   |-------+----------|   Host A  |
                       |          |       |          |           |
                       +----------+       |          +-----------+
                                          |
                                          |          +-----------+
                                          |          |           |
                                          +----------|   Host B  |
                                                     |           |
                                                     +-----------+