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Postbox for Mac

Email client focusing on privacy protection

Quick answer: Postbox is a communication app for macOS. Install it with brew install --cask postbox. The licence is not declared in Homebrew metadata.

What Postbox is

Postbox is a communication app for macOS: email client focusing on privacy protection.

It is distributed as a Homebrew cask, which installs a .app bundle into your Applications folder. Homebrew only automates the download and install step; the licence terms come from the vendor.

How to install Postbox

  1. Open Terminal (press ⌘ + Space and type “Terminal”).
  2. If Homebrew is not installed yet, run the installer below once.
  3. Run brew install --cask postbox.

Homebrew installer, if you need it:

Prefer a graphical installer? Download it from the official site. MacPicks never hosts or mirrors binaries — the Homebrew command always pulls from the vendor's own release.

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Frequently asked questions

How do I install Postbox on Mac?

Run brew install --cask postbox in Terminal. This requires Homebrew; if you do not have it, install it first with the command below.

Is Postbox open source?

Homebrew's metadata does not declare a licence for this app, so the official site is the authoritative source.

Does Postbox run on Apple silicon?

Yes, as a universal binary.

How popular is Postbox?

Homebrew does not publish a 30-day install count for this package, which usually means it is installed directly rather than through the analytics-reporting path.

What version of Postbox is current?

The latest packaged version is 7.0.65.