Mozilla Thunderbird icon

Mozilla Thunderbird 159.0 for Windows

by MZLA Technologies (Mozilla) · Free · Updated 1 Nov 2026
Download from official website
Install with one command — open Windows Terminal or PowerShell and paste:
winget install --id Mozilla.Thunderbird -e
Uses winget, Microsoft's official package manager. Want several apps at once? Try the Bulk Installer.
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Free email client with calendar and contacts

Thunderbird is a free, open-source email client from the Mozilla family. It manages several email accounts — Gmail, Outlook.com, Yahoo, company mail and others — in one place, with a unified inbox, powerful search and message filters.

Built-in features include a calendar and task list, an address book, a chat client, an RSS feed reader, and OpenPGP end-to-end encryption for sending private email. Add-ons and themes let you customise it further. Because messages are stored on your computer, you can search and read older mail even when offline.

Setting up accounts is mostly automatic, though some corporate servers need manual settings. If you prefer a desktop email program to webmail, or want an alternative to Microsoft Outlook without a subscription, Thunderbird is a mature and reliable option.

Pros

  • Multiple accounts in one inbox
  • Calendar and built-in encryption
  • Free with no ads

Cons

  • Some corporate servers need manual setup

Alternatives to Mozilla Thunderbird

Technical details

Version159.0
LicenseFree
DeveloperMZLA Technologies (Mozilla)
File size—
Last updated
winget IDMozilla.Thunderbird
RequirementsWindows 11
Windows 10