MailMate

MailMate is an IMAP‑based email client designed for macOS that emphasizes keyboard‑driven interaction. It lets users compose messages with built‑in Markdown support, apply tags, and manage signatures automatically. The client also offers built‑in cryptographic features, allowing OpenPGP and S/MIME encryption and signing of email.

For users who need precise control over their mailbox, MailMate provides advanced search capabilities with complex conditions, drill‑down search links, and smart mailboxes that can be customized extensively. Multiple notification methods and alternative message viewer layouts—including a widescreen view—help adapt the interface to different workflows. Integration points are available for third‑party applications, and the client supports BusyContacts for address management. The software is positioned for macOS users who prefer a highly configurable, keyboard‑centric email experience.