Domino route with smtp instead of notes route

Having problem mailing another domain that we have in our non-adjacent domain. It should route mail threw their domain but when sending a mail to a user in their addressbook the domino server try with smtp and put wrong domain in the end of the address.

It look like it’s something wrong with the address lookup.

Here is the error message;

because: Error transferring to SOFTSCAN-RELAY.SOFTCOM.DK; Maximum hop

        count exceeded.  Message probably in a routing loop.