How Would One be able to Contact Leaders of Foreign Governments?

Question

If one wanted to contact any world leader, how would they? What are some of the adresses/e-mail adresses of world leaders? Also, would they respond back? If one wanted to call them, would that be possible? If so, what are some phone numbers to reach them?

Answer 1

Formal request must be coursed through the Protocol Officers of the Heads of States.