As Hannes has told me, we only can send messages to people in our own server, so that sucks IMO, and as I've seen, we can't share private notes to just a contact, but a group or all our "friends". If we would change the way that it works, sending a message would be something as simple as creating a "private note" mentioning this user (or users). Is it too difficult to change? anyone has experimented any kind of error in this year about private notes?