Gmail turns 9 years old today. Google initially launched the world's most popular email service, with 425 million active users, on April 1st, 2004.
Many people thought Gmail was a prank, it offered a massive 1 GB when services like Hotmail offered 2 to 4 MB on average. Google is notorious for taking April Fools Day very seriously. Even today, Gmail for Business offers inboxes 50 times larger than the industry average.