The best Mac email apps offer a great user experience, support for popular email services, advanced features, and quality of life improvements. Apple Mail is the top choice for its free and constantly improving nature, making it a solid default solution. Microsoft Outlook stands out for its feature-rich interface and support for profiles, which separate work and personal emails. Spark improves your relationship with email by providing a command center for easy navigation, smart sorting, and AI-powered features like Copilot. Canary Mail offers advanced security features, including SecureSend and AI-powered email management. Mailspring is a fast and free email client with robust search capabilities and customization options. For Gmail users, Mimestream provides a native macOS app experience that respects the Gmail layout and features while integrating with Mac's interface. Ultimately, the best app depends on individual preferences and needs.