What is the history of email

Electronic Mail is called Email in short, E-mail was started in 1965, it is an Internet service, the user had already got the facility to compose, send and receive email from ARPANET, the full name of ARPANET Advanced Research Projects Agency Network is the world's first packet-switching network, which was the world's first network in which TCP / IP model was used, due to ARPANET, the foundation of the Internet was laid and more and more networks were connected to ARPANET. TCP/IP model was invented in 1974 to connect