I have been trying to setup external links between two GW systems.

The systems actually share a network, two different IP ranges though.

I have ensured connectivity between both networks.

Setup the External domain withing GW on both systems, however, I can't get any communication or sync of address books to work.

I tried the link direct first, since they can see each other, MTA to MTA, I then tried with the GWIA gateway link, but I get "BAD PASSTHRU MESSAGES".

What am I missing? I looked in the manuals, and they say with GW8 you should use the GWIA Gateway option, but I can't get it to work. I figured the MTA to MTA would be best, since they are on the same physical network.

Any ideas?

Thanks in advance