FMail The native Fastmail client for macOS


The current version is 1.6.6 [2019-11-10] (1)

For years now, I use Fastmail as my email provider. Have a look there if you do not use this service and you want to know what it can do for you.

For iOS and Android there are native clients, but not for macOS. The web interface used by Fastmail is excellent.
The one thing missing for me, is that the web interface cannot handle email links. So when you click on such a link it is the macOS Mail application that opens.
That is not what I want.
Enter FMail.

When you have installed FMail and have adjusted your default email client, an email link will open the FMail client with all provided fields filled.
Downloading is handled inside the application and the files are saved in your Download folder.

FMail is customizable.

preferences-1 preferences-2 preferences-3 preferences-1

As a bonus: your surfing does not -accidentally- close your email window.
FMail is a real application, taking little resources on your system.
Runs on macOS 10.14 Mojave and higher.


  • Handles email links from other programs/documents *
  • Notifies you when new mail arrives
  • The Dock icon can show the number of unread mails in the Inbox or in all folders
  • Status Bar Menu for easy access
  • Detects when FMail is not the default email reader
  • Window bar shows the title of the selected email
  • Mouseover shows email links (so you can decide if you want to click a specific link)
  • Attachments are downloaded from inside the application
  • .pdf files and images can be previewed and/or downloaded
  • Show Raw Message inside the application and the text is easily copied to the pasteboard
  • Gracefully handles Javascript confirmation alerts
  • Application specific contextual menus
  • FMail uses Safari for handling Print commands*)
  • Shortcuts for composing and searching mail
  • Can start at login
  • Auto dark/light mode in Mojave
  • FMail is a Notarized and Sandboxed application
  • Written entirely in Swift
*)Ok, I know it is a little technical. We have to use the safe `WKWebView` class inside our application, but at the moment `WKWebView` for macOS has no build-in support for printing. That's why we start Safari to complete the job. Come on Apple!

Change the default email client

For FMail to work as your default email client, you have to change a setting.
Open the Apple Mail client, go to the Preferences (⌘,).

Here we select FMail as Default email reader. Quit Apple Mail and you're done.
If FMail is not in the menu yet, use Select… to choose for FMail.


macOS 10.14 Mojave or higher.


The program is free to use and without any warranty.

(1) macOS Catalina.
Apple wants to keep all software on your computer safe. Therefore Apple wants that applications are Notarized and Sandboxed.
This can cause side effects when updating an older version that is not notarized or sandboxed.
If you run in such a problem, click the download link, to get the updated application.

The FMail application does not collect personal data from the user.
FMail is an application shell for email hosting service. You can have a look at their privacy policy here.