Just to be clear when you talk about "Orthodox Priest or bishop to whom I am not in communion" you mean someone like an Old Calendarist, not, say, the Greek Archbishop of America if you are in the OCA, right? I am assuming that you mean the first, but for those who may not know quite so much about Orthodoxy, I just want to clarify.
For example, I am in the Antiochian Orthodox Church, that means for example that my jurisdiction is not in communion with the Autonomous Orthodox Church of Europe or the Holy Roman Orthodox Church (for example). If I meet one of their clergy, I would be polite and call their clergy by their proper name and title but I would not pray with them, ask for their blessing or take communion from them---we are not in union or communion withthem. Should that situation change as it did with ROCOR and the new calendar churches in communion with the Ecumenical Patriarch, I would be IN union with them and allowed to commune by my jurisdiction as well as by their jurisdiction. IN Communion means that both jurisdictions agree to a common understanding and practice of the Orthodox Church. Even if one is not in communion, it does not mean that we should be rude, mean, or angry instead we respond with mutual respect and offer the other the love of Christ until we can work out our issues and return to union or communion.