The email client you decide to use should provide you with a well-designed user interface that aids you in your quest for Inbox Zero. Overall Design - Dealing with email can be annoying, and using a poorly-designed email client can compound the frustration factor.In selecting the best email app for macOS, we used the following criteria to select the winner: In this article, we’ll take a look at several of the more popular options and introduce you to our favorite. If you use plug-ins to extend Mail.app’s functionality, Apple has a history of making changes that cause developers to re-write their plugins, resulting in a broken email workflow while you wait for updates.įortunately, there is no shortage of excellent third-party email clients that aim to fix Mail.app’s shortcomings. It can be buggy, occasionally has issues playing nice with Gmail, and lacks some more advanced features that are present (and have been present for years) in other third-party email clients. While Mail.app provides a free, full-featured email client on every Mac and has even pioneered some innovative features over the years (like VIP and Handoff), it’s definitely not for everyone. The Mac’s default Mail application (also referred to as “Mail.app” or “Apple Mail”) has a somewhat checkered past.