The phrase began as America Online's notification for incoming email, voiced by Elwood Edwards, whose warm delivery turned a simple alert into one of the most recognisable sounds of the early internet era. It moved beyond software into popular culture, most famously as the title and central idea of the 1998 romantic comedy You've Got Mail, and later into memes, reaction videos and nostalgic edits. It endures because it instantly evokes dial-up-era optimism and the simple thrill of a new message arriving.