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FMail2,
the free native Mac application for Fastmail users.

FMail2 overview

Email provider Fastmail has native iOS and Android clients. But not for macOS. The web interface used by Fastmail is excellent.
The big thing missing, is that the web interface cannot behave like a native mail application. It can, for example, not handle email links. When you click on such a link it is the macOS Mail application that opens. That is not what we want.

Enter FMail2

FMail2

When you have installed FMail2 and have adjusted your default email client, a click on an email link will open FMail2 with all provided fields filled.

There are a lot of extra options too. Downloading is handled inside the application and the files are saved in your Download folder (or to another folder of your choice). If you use Fastmail from your browser switch to FMail2. For free. Guaranteed no tracking of your data. You won't regret.

FMail2 is a all Swift Mac application, taking little resources on your system and runs natively on Apple Silicon.

Features

A native macOS application

Advanced Settings
Settings

Clicking an email link elsewhere will open the Compose panel, with all provided fields filled (if you have made FMail2 your default email client)

FMail2 will offer to be the default email program

Supports AppleScript

FMail2 supports native macOS tabs and remembers the tabs as they were when you closed the program (no more then 6 tabs are reopened; otherwise Fastmail complains there are too many connections)

Command (⌘) click on a link will open a new tab (for Mail, Contacts, Calendar etc.)

Decide what folder you want to use for your Downloads

Choose your Notification sound

You can override Dark- or Light Appearance, when an email doesn't show well in a certain mode

Run the Fastmail beta version (if some functions do not work anymore, start by disabling this option in the Settings)

Can show the number of unread emails in the Dock icon

The title bar has history buttons, shows the used Fastmail url (in red when beta), scale buttons and a padlock for selecting to hide when FMail2 does not have the focus
Light and dark mode

You can choose to automatically hide FMail2 if it loses focus

Native printing of emails

Secure - Not running in your browser means you are better protected against web tracking

Secure - Mouse over will show you all links, so you know before you click

Secure - A contextual menu lets you check the real address of an URL, also a shortened one, before you open it
Validate URL

Copy a RFC-5322 compliant Message-ID to the clipboard via a shortcut, the Edit menu or the contextual menu and paste it in an application that supports hyperlinks.
Later on, open that link in FMail2 or in any other email client that supports the RFC-5322 compliant Message-ID (such as Apple Mail)
Open link

Supports Hook via standard (RFC-5322) email ID's

Runs natively on Apple Silicon, is notarized by Apple and sandboxed

Automatic updates (if you want)

Localized in English, French and Dutch

Less then 10MB in size
(compare with 300MB+ for an Electron -good for the developer, bad for the user- based application)

Free Download

FMail2 runs on macOS 11.3 Big Sur and higher and is notarized by Apple.

You can still download the last version of FMail.

If you find FMail2 useful you could

Disclaimer

If Fastmail decides to change the underlying code, there is no guarantee I can keep FMail2 alive.

FMail2 is free to use and without any warranty.