cooperation Company Communication

[Dan Witcher 0]

So, I am playing in the PvP server and I have a small wood base setup on the back end on and island with a large company opposite me. They have remained neutral to me and vice versa however I have suffered raids from multiple other company's. What I would like to know is if a feature can be added for me to make contact with a company that does not entail sneaking into there base (could be seen as aggression) and leaving a note in a lock box asking toward cooperation. 

Something like an interstitial message that I can send from my company to theirs that will contain a brief outline and then full message if they read it. Allowing playing who are on at different times to join alliance.