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HomeInternet UtilitiesEmail ClientsFMail3

FMail3 for Mac

Fastmail And FMail3: Bridging The Gap On MacOS.

Free
In English
Version 1.1.0
5.0
Based on 1 user rate

FMail3 overview

Email provider Fastmail offers native iOS and Android clients but lacks a dedicated macOS application. While Fastmail’s web interface is excellent, it has one significant limitation: it cannot behave like a native mail application on macOS.

The Problem

The primary issue is that the web interface cannot handle email links (mailto: links) properly. When you click on an email link, macOS defaults to opening the built-in Mail application instead of Fastmail’s web interface—which defeats the purpose if you’re trying to use Fastmail as your primary email client.

The Solution: FMail3

FMail3 represents a modern evolution of FMail2, built in accordance with Apple’s design guidelines. This wrapper application allows Fastmail’s web interface to function more like a native macOS mail client.

What’s new in version 1.1.0

  • On July 31 Fastmail changed the url format, so some things wouldn't work anymore
  • Search inside an email; use the default shortcuts for finding the next (⌘G) and previous (⇧⌘G) hits
  • Fastmail contextual menu Open in new tab support
  • Added support for opening links: ⌘-click: Opens a link in a new tab ⌘-Shift-click: Opens a link in a new tab, and makes it the active tab ⌘-Option-click: Opens a link in a new window ⌘-Option-Shift-click: Opens a link in a new window, and makes it the active window
  • For the nerds among us: added an easy accessible log via the Help > Logs > Open Logs Folder menu or open the current log via Help > Logs > Open latest Log File
  • Added Setting for using an old-fashioned toolbar (that allows to show text under the icons)
Changed
  • Refined download progress animation for a more subtle look
  • Print header date and time now in local (long) date
  • Rewritten logging / old logs are automatically cleaned up
Fixed
  • No longer asks to set default email client when this option is turned off in the Settings
  • Invalid JMAP call
  • Prevent notification overload
  • Changed print layout to avoid possible clipping (thank you Bob)
  • Several small fixes

FMail3 for Mac

Free
In English
Version 1.1.0
Write a detailed review about FMail3

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5.0

(1 Reviews of FMail3)

  • Comments

  • User Ratings

Sigsgaard
Sigsgaard
Jul 17 2025
1.0.1
5.0
Jul 17 2025
5.0
Version: 1.0.1
Really nice mail client for Fastmail users on Mac OS
Sigsgaard
Sigsgaard
Jul 17 2025
1.0.1
5.0
Jul 17 2025
5.0
Version: 1.0.1