K-9 Mail
K-9 Mail

K-9 Mail

Communication

| Mozilla Thunderbird

Play on PC with BlueStacks or from our cloud

  • Overview
  • How to Download

Page Modified On: September 02, 2025

Run K-9 Mail on PC or Mac

Get freedom from your phone’s obvious limitations. Use K-9 Mail, made by Mozilla Thunderbird, a Communication app on your PC or Mac with BlueStacks, and level up your experience.

K-9 Mail is that no-nonsense email app people install when they want control without extra fluff. It handles multiple accounts from different providers and pulls everything into one unified inbox, so checking mail does not feel like a chore. The interface is clean and quick, taps do what they should, and nothing feels hidden behind weird menus. It is open source and privacy focused, so it only talks to the actual email provider and does not sneak in trackers. Sync can run quietly in the background or use push, and search works both on the phone and on the server, which is great when a message is not stored locally but you still need it now.

Encryption is built in through OpenPGP using PGP/MIME, and it plays nicely with the OpenKeychain app for sending and reading protected mail. Filters, folders, and notifications behave predictably, and the app just shrugs at big mailboxes. On PC with BlueStacks it feels comfortable, almost like a lightweight desktop client. Typing long replies with a keyboard, skimming threads in a resizable window, and picking attachments through the file picker all feel straightforward. It is part of the Thunderbird family these days, still community made, which shows in the focus on reliability rather than shiny tricks. Not flashy, just fast, private, and dependable, which is exactly what an email app should be.

Big screen. Bigger performance. Use BlueStacks on your PC or Mac to run your favorite apps.

How to Download and Run K-9 Mail on PC or Mac

  • Download and install BlueStacks on your PC or Mac

  • Complete Google sign-in to access the Play Store, or do it later

  • Look for K-9 Mail in the search bar at the top right corner

  • Click to install K-9 Mail from the search results

  • Complete Google sign-in (if you skipped step 2) to install K-9 Mail

  • Click the K-9 Mail icon on the home screen to start playing

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Minimum System Requirements

With BlueStacks 5, you can get started on a PC that fulfills the following requirements.

  • Operating System

    Microsoft Windows 7 or above, macOS 11 (Big Sur) or above

  • Processor

    Intel, AMD or Apple Silicon Processor

  • RAM

    at least 4GB

  • HDD

    10GB Free Disk Space

Note:

* You must be an Administrator on your PC. Up to date graphics drivers from Microsoft or the chipset vendor.

K-9 Mail - FAQs

  • How to Run K-9 Mail on Windows PC & Mac?

    Run K-9 Mail on your PC or Mac by following these simple steps.

    • Click on ‘Download K-9 Mail on PC’ to download BlueStacks
    • Install it and log-in to Google Play Store
    • Launch and run the app.
  • Why is BlueStacks the fastest and safest platform to play games on PC?

    BlueStacks respects your privacy and is always safe and secure to use. It does not carry any malware, spyware, or any sort of additional software that could harm your PC.

    It is engineered to optimize speed and performance for a seamless gaming experience.

  • What are K-9 Mail PC requirements?

    Minimum requirement to run K-9 Mail on your PC

    • OS: Microsoft Windows 7 and above:
    • Processor: Intel or AMD Processor:
    • RAM: Your PC must have at least 2GB of RAM. (Note that having 2GB or more disk space is not a substitute for RAM):
    • HDD: 5GB Free Disk Space.
    • You must be an Administrator on your PC.