Meet Thunderbird Thunderbird is a free and open-source software project founded in 2003 to make communicating and collaborating better. We are supported by the talent and generosity of thousands …

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Nov 20, 2025 · Our team remains hard at work on Thunderbird Pro! Get the latest developments on Thundermail, Appointment, and Send, and our Early Bird plan.

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Apr 4, 2025 · Announcing a new Thunderbird email service called Thundermail as part of the Thunderbird Pro suite of additional services.

Jul 28, 2025 · TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.