E-mail was first introduced at MIT in 1965 and became more widely used with the spread of the internet. Ray Tomlinson sent the first email over ARPANET in 1971 and a standard format was proposed in 1977 to allow email to be sent across different networks. Throughout the 1980s and 1990s, email became more popular and accessible with the commercialization of email programs and services and the rise of the internet. Standards and features continued to develop, addressing issues like spam and making email more full-featured and integrated into other applications and devices.