Canary Mail - Encrypted Email 2.12 MAS (macOS)

Canary is an exciting new email client for Mac that offers a full set of powerful features with one key difference - your emails are not stored on a 3rd-party server. Every facet of Canary has been designed in accordance with our core philosophy of ensuring complete user privacy and offering reliable and snappy performance. Unlike other apps/services, using Canary is not contingent on providing access to your data.
Mac App Store: https://geo.itunes.apple.com/app/id1236045954
Compatibility: OS X 10.10 or later, 64bit