In every line of business, email is probably the most commonly used means of communication in the world; especially for those whose native languages are not English, email is a life saver. We all know that making conversations with companies from different countries can be so stressful and we try our best to express ourselves right.
As the subject of the conversation is business it is very important to express yourself well and the fear of being misunderstood is what makes us stressed talking on the phone. As such, email is both a clear means of communication and a recorder of our conversations. In the event that a dispute arises between parties for some reason, then email correspondences step in and settles the conflict.