OverviewWho's Affected?TimelineThe GuidelinesSender AuthenticationImpactToolsImplementationBonusSummaryReferences Around 50 years ago, in October 1971, Ray Tomlinson, a graduate of MIT, sent the first email email over a network.. Last year, ~121 trillion emails were sent between ~4.3 billion people. Email is the the most important written form of communication on this planet and will remain so for the foreseeable future. Overview On October 3, 2023, Google and Yahoo announced upcoming email se...