Gmail, Google's free email service, is almost 20 years old having launched as an invite-only public beta on April 1, 2004. In its early days, that invite-only scarcity and the fact that it seemed like ...

Gmail has come a long way in its nearly 18-year history (it hits that milestone in April), as a key part of what's now a 50-year history of email as a medium. The search giant quickly set itself apart ...