Members of the Church of Jesus Christ of Latter-day Saints (LDS Church) are considered by church leadership to engage in apostasy when they publicly teach or espouse opinions and doctrines contrary to the teachings of the church, or act in clear and deliberate public opposition to the LDS Church, its doctrines and policies, or its leaders.
History of email (Wikipedia) The history of email entails an evolving set of technologies and standards that culminated in the email systems in use today.