FMail The native Fastmail client for macOS

FMail/Hook AppleScript

To let FMail work with Hook, you will have to add the following AppleScript snippets to Hook's Preferences, tab Scripts.

Open Item

(No script required)

Set scheme to email

Get Name
tell application "FMail"
    get name
end tell
Get Address
tell application "FMail"
    set theURL to getAddress
end tell

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.