Betterbird is an enhanced version of Thunderbird with new features and bug fixes not available in Mozilla Thunderbird.

Betterbird looks and feels like Thunderbird, but it's easy to spot the new features available. Many of these features have been requested for over a decade, and some have been attempted and failed. Examples include:

Multi-line view like in Outlook, Lotus Notes, and Postbox
Customise the header pane buttons
Complex search terms
Quick Filter untagged messages
Permanently decrypt messages
Global search in encrypted messages
Quick Filter search in encrypted messages
Notification of new messages in newsgroups
Configurable display of addresses in the message list
And more


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