Postmaster v0.1.1

Download the installer for your operating system below.

macOS (.dmg) — the build is ad-hoc signed but not notarized (no paid Apple
account), so the first launch is blocked by Gatekeeper. After dragging Postmaster to
Applications, right-click the app → Open (then Open again), or run:
xattr -dr com.apple.quarantine /Applications/Postmaster.app
(Installing via Homebrew does this for you.)

Windows (.msi / -setup.exe) — unsigned, so SmartScreen shows "Windows protected
your PC" → click More info → Run anyway.

Linux — .AppImage (chmod +x then run) or .deb. No extra steps.

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Once installed, Postmaster updates itself: it checks this releases page on launch
and installs newer signed builds in place, so you only do the manual install once.

Postmaster v0.1.0

Download the installer for your operating system below.

macOS (.dmg) — the build is ad-hoc signed but not notarized (no paid Apple
account), so the first launch is blocked by Gatekeeper. After dragging Postmaster to
Applications, right-click the app → Open (then Open again), or run:
xattr -dr com.apple.quarantine /Applications/Postmaster.app
(Installing via Homebrew does this for you.)

Windows (.msi / -setup.exe) — unsigned, so SmartScreen shows "Windows protected
your PC" → click More info → Run anyway.

Linux — .AppImage (chmod +x then run) or .deb. No extra steps.