MailMate is an IMAP email client for Mac OS X featuring extensive keyboard control, Markdown supported email composition, advanced search conditions and drill-down search links, equally advanced smart mailboxes, automatic signature handling, cryptographic encryption/signing (OpenPGP and S/MIME), tagging, multiple notification methods, alternative message viewer layouts including a widescreen layout, and much more. A quick overview is given below, but an extensive list of screenshots is also available. You can read about MailMate and its developer here.

Keyboard Centric

Navigate, read, tag, and reply to emails using the keyboard only. Change current mailbox or move emails to a mailbox using abbreviations. Create your own custom keybindings for common tasks.

Markdown Support

Integrated support for Markdown, an easy-to-learn plain text markup language. Create rich text emails using plain text only. Make outlines, tables, code segments, or simply emphasize text. Read more.

State-of-the-Art Searching

Search rapidly in the content of any email header in all mailboxes of all accounts. Search for unquoted or quoted body text. Browser-inspired searching including going back in history.

Smart Mailboxes

Base smart mailboxes on any/all combinations of other (smart) mailboxes and use any/all combinations of matching conditions. Note the advanced and powerful “is in” comparison method.

Dynamic Signatures

The default signature and placement (top/bottom) of the signature in a new message is automatically derived from emails to the same recipient. Use a shortcut to select a different signature. Read more.


Optionally display multiple dock counters, multiple menu bar counters, and notifications. Specify format strings for menu bar menu items and notifications.

Layouts / Views

Alternative window layouts are available including a widescreen layout. Special views are used to show thread arcs and email statistics.

Multiple Accounts

Universal mailboxes are supported including a unified Inbox. All IMAP servers are supported including SSL/TLS and server certificate validation.

Full Offline Access

Almost all functionality is available when offline including creating/deleting IMAP mailboxes. Changes done while offline are automatically synchronized when going online.

Keep Me Posted

Get emails about new releases:
No more than two emails per year.

The Press

Macworld wrote:
  • MailMate’s here to help you bend your email to your will, to tame the chaos of even the most cluttered and sprawling account. And MailMate doesn’t mess around.
  • But MailMate’s true, jaw-dropping power lies in its ability to search and filter messages via Smart Mailboxes.

The Users

Crowd Funding Campaign