Projects / Thunderbird

Thunderbird

Email & Communication

A desktop client bringing email, calendars and contacts together.

Use with conditions
Last updatedRelease 2026-09-22
Open source licenseMozilla Public License (official rights statement; version scope needs further checking)
PlatformsWindows · macOS · Linux; Android listed separately
DeploymentDesktop / Mobile

About this project

Thunderbird for desktop brings email, calendars, contacts and tasks into one application. It can manage multiple accounts, with separate account views or a unified inbox for incoming mail. Message organization and search sit alongside scheduling tools, allowing communication and personal plans to be viewed within the same working environment instead of being represented only as email messages.

Calendar functions handle appointments, task tools record things to do, and the address book organizes contacts. Customization options adapt the interface to the way the application is used. The desktop product page presents these as related parts of the product, supporting a workflow that combines handling correspondence with maintaining schedules and the people involved in it.

The website provides distinct entry points for the desktop and Android products, and lists Windows, macOS and Linux for desktop use. It also describes extensions and customization. The product for the relevant device is therefore the starting point for its own features and support material; the separate platform offerings should not be treated as one identical interface or release.

Decision guide
01

Why it is worth a look

  • Manage email accounts together
  • Email organization and filtering
02

Before you use it

  • The repository is an EXPERIMENTAL mirror under the official organization and should not be described as the confirmed sole canonical upstream
  • Check provider authorization and synchronization/deletion behavior when connecting an account for the first time
  • Android is a separate product line; do not combine its version number with desktop versions
Manual setupModerate
With an AI agentLow
DeploymentDesktop / Mobile
Additional requirements1 confirmed; others not verified

Use an officially listed operating system and architecture; Have application installation permissions and sufficient local storage; Confirmed requirements: Account; Some requirements have not been verified. Check the official setup instructions.

03

What it can do

  • Manage email accounts together
  • Email organization and filtering
  • Calendar and contact management

Who it fits

Good for

People wanting centralized personal or work email management

Not a fit

Judgment: Users unwilling to configure email authorization, synchronization and local backups

Getting started

  1. Obtain the stable desktop installer from the official website
  2. After installation, the user signs in and authorizes their own email account
  3. Check sending, receiving and synchronization settings with a test message