Its design hews more closely to the traditional Mac look and feel, rather than adopting a slick iOS-like appearance. Top choice: Postbox 3 ( ) isn’t the newest or sleekest candidate in this roundup. We’ve found one strong program that offers a great mix of features, usability, and value for a broad swath of users, plus several more that will cater well to more specialized preferences. But with so may options to choose from, it’s now even harder to pick out the best email client for your particular needs. With a panoply of clever features and new ideas, these contenders have also mounted a serious challenge to the relatively stagnant Apple Mail and Microsoft Outlook. On the General tab, in Default email reader, select Microsoft Outlook.Ī recent surge of worthy new email clients offers Mac users some of the best choices they’ve ever had for managing their mail. The Mac default is to use the Mail app, but you can change the default to Outlook.