Editor's note: "Behind the News" is the product of Sun staff assisted by the Sun's AI lab, which includes a variety of tools such as Anthropic's Claude, Perplexity AI, Google Gemini and ChatGPT.

As the most popular provider in the world, Google's Gmail is practically synonymous with personal email. But one issue has plagued Google users ever since Gmail first launched in 2004: Changing your Gmail address   -- which is also your Google username, at least by default   -- has never been possible.

Fox News Flash top headlines are here. Check out whats clicking on FoxNews. com. For years, one of the most frustrating limits inside the Google ecosystem was simple but painful.