Windows Email Thunderbird 2025

Windows Email Thunderbird 2025

‹ Ubuntu Email Thunderbird 2025

Windows 11 25H2 ›

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Latest Thunderbird Updates & Release Dates

  • February 24, 2026: Official release of Thunderbird 148.0 and 140.8.0esr, introducing improved accessibility in tree views and "Favorites" destinations for the File/Move buttons.

  • February 11, 2026: Monthly development update finalized NTLM authentication for Exchange accounts, resolving long-standing login loops for corporate users.

  • December 18, 2025: Launch of the Thunderbird 2025 "Eclipse" review, confirming the full integration of native EWS email support in the monthly release channel.

  • November 20, 2025: Introduction of Thunderbird Pro, a new subscription suite featuring Thundermail (open-source email service) and Send (encrypted file sharing).

  • July 12, 2024: Initial debut of Thunderbird 128 "Nebula," the foundational Extended Support Release that introduced the Cards View and native Windows notifications.