Have you recently started using email exchange for all official communication? Do you think that it will help you by serving as evidence in future? Well, you are partially right and partially wrong? Wondering how? Well, just think what will happen if all the mails get deleted by mistake? It may happen anytime. So, what is the option? All you need is to just develop a back up option. Choose the important mails for which you would like to have the backup option. More detail :-http://www.customercare-email.com