A messaging system for providing messaging service between or among user accounts includes a message database server. The message database server includes an account module to maintain user accounts and an upload module to receive message data from a user communication device associated with a user account. The message data may include a message and a share list that authorizes identified user accounts in which the message is to be shared. A single instance storage module may store the message as a single instance. A share module may share the message with the identified user accounts and delete the message at a predetermined time as specified in the share list.