[exim] Message sharing

Hi

I want to send every mail for a very special domain to a set of mail
servers. It needs to be unchanged as far as possible (best case: no
modifications to the mail at all.).
I tried:

robot_1:
driver = accept
domains = robot.mydomain
transport = server
address_data = 1
unseen = true

robot_2:
driver = accept
domains = robot.mydomain
transport = server
address_data = 2
unseen = true

<usual mail processing here>

server:
driver = smtp
hosts_override = true
hosts = 192.168.100.$address_data

However, this does not work.
I suspect exim's mail deduplication system to be the problem.

Even more strang: I see this in the logs:

2007-05-09 13:17:08 1HlkAN-0001dN-Fx => ping@??? R=robot_2
T=server H=192.168.100.2 [192.168.100.2]
2007-05-09 13:17:08 1HlkAN-0001dN-Fx -> ping@??? R=robot_1
T=server H=192.168.100.2 [192.168.100.2]

While I suspect in the second line it should read 192.168.100.1 ?

What can I do?


Regards,
Steffen



PS: And yes, there will be more then 2 other servers and I would prefer one
router to deliver them all - just don't know how.