I have to agree, the diplomatic relation between our people should be defined. It's not a coincidence that it never did happen before. You see we have ambivalent feelings about that matter. While Rheinland is an enemy to Liberty, so is the Libertonian government, who you oppose. For what we see from here, your House resides in a dictatorship. Forgive the term, it might sound harsh, but I do not use it in a purely negative manner. Compared to the malignant capitalistic oligarchy that taken over our spaces, it's a honest and centralized form of governing. If the liberation of my people from the oppressing regime ever happens by your forces, I have serious doubts that the ruling alternative you present will be accepted by the common man - including the Hackers.
But that's a really long way from where we are now. Until than, our goals are common, and the distraction the war with Liberty provides for us is invaluable (not to mention those rumors I hear about operations against Bretonnia's forces - they also become a pain in our assets).
So I can assure you of the following: Our forces won't be deliberately hindering your efforts against any governing body, their lapdogs, and their supply lines. Sadly our custom of encouraging free thinking and decision amongst our pilots includes that I can't stop any individual who driven by patriotic feelings attacks a passing craft of yours - but considering that you have an army, while we only deploy small task-forces, any loss we may cause will be insignificant. One exception there is - Magellan space. By certain reasons we can't allow any kind of aggression in that area, as it might draw unwanted attention.
And about the interception of hostile trade - I'm sure we can work something out. We welcome any confiscated cargo - and of course our people won't stop anyone who delivers supplies to our bases. Also if you have logistic difficulties in hostile territories, our Smugglers Department would be more than happy to dispatch some transports to relieve your haulers.