In this article, we take a look at some of the best third-party macOS email clients that exist today: 1. It’s a pretty capable client that just works, but there are naturally better alternatives. In OS X (now macOS), the native Mail app has been pretty capable, and over the last several years, this is one of those areas of the operating system that has seen consistent improvement. If you like email clients like Outlook or the standard Mac Mail app, you'll probably enjoy Thunderbird.
