VMware interview questions

Communication round is detailed review of resume with behavioral questions. Technical round had questions about networks, problem solving like how to send a message in a box if the the sender and receiver both have different locks and keys (public key encryption), if there is a bulb in a room and 4 switches outside, how will you know which switch is connected to the bulb by entering the room only once.

How to send email out side a intramail network?