Thunderbird is coming to Android – in K-9 Mail form.This is an open-source chat protocol that aims to bridge different systems: for instance, it offers a bridge to WhatsApp, another to Signal, and a commercially hosted service. Now it also supports VK's Odnoklassniki (a major Russian social network), and Matrix. Thunderbird can talk to various groupware calendar and contact servers, including both private and corporate Google Mail accounts, Microsoft Exchange and Office 365, and others. All of these are built-in features – the former Lightning calendar add-on is now an integral part of the app, as is PGP support, which used to be an add-on called Enigmail. There's a new 'Spaces' toolbar, which appears vertically on the left of the app window and lets users quickly flip between inbox, address book, calendar, task list, and chat tabs.

From now until the next major release, Thunderbird 102 will get a regular stream of minor updates and bug fixes.ġ02 has a modernized look and feel. This is normal for the app – it follows the same approximately annual release cycle as Firefox's Extended Support Releases, the most recent of which was also version 91.

The latest release is the first major upgrade since version 91, which The Reg looked at last August. Open-source cross-platform email and messaging client Thunderbird has hit version 102, with a new look and improved functionality, including Matrix chat support.

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