That’s why we’ve created this guide to help you make Gmail your default email handler. This may seem like a First World problem, but it can be a real nuisance if your work depends on a lot of online communication. Unfortunately, most operating systems don’t use Gmail by default, so you’ll have to change the default mail client yourself. Mailto links are hyperlinks that automatically take you to your email client with the recipient email address already entered, so it can be an issue if your default email handler isn’t your preferred one. It happens to everyone: you click on a mailto link in your browser, and it opens in your computer’s default email client instead of Gmail.