Sieve Script Editor

ThunderAI is a Thunderbird Addon that uses the capabilities of ChatGPT, Gemini, Claude or Ollama to enhance email management.

Thunderbird add-on turning your emails into beautifully visualized email account stats.

Extensions / Add-Ons for Mozilla Firefox and Mozilla Thunderbird

External Editor Revived is a Thunderbird MailExtension which allows editing emails in programs such as Vim, Neovim, Emacs, etc.

Remove Duplicate Messages

Quick Folder Move Add-on for Thunderbird

Монгол үгийн алдаа шалгах толь, Mongolian spellchecking dictionary

Fork of LookOut (fix version)

Monterail Full Dark, a Thunderbird theme inspired by the mockup of Monterail

Outlook style headers and few goodies for Thunderbird

Thunderbird add-on that shows the spam score your mail server already assigned to each message, in a colour-coded mail-list column with a rule-by-rule breakdown. Reads SpamAssassin, rspamd, MailScanner, OVH, Sophos and more.

This provider add-on adds Google synchronization capabilities to TbSync. Only contacts and contact groups are currently managed, using Google's People API.

MCP server that drives a local Thunderbird - mail, folders, contacts, calendar, filters and settings - from Claude Code, Codex and any other MCP client. 112 tools, Python.

This addon adds awesome statistics to your beloved Thunderbird!

Thunderbird add-on to show full sender and recipient address column in message list

A thunderbird mailextension for explicitely choosing the correct sender identity before opening an email editor.

Primitive Thunderbird plugin for communicating with MS Exchange via Exchange Web Services (EWS)

Configurable custom OAuth2/OIDC provider for Thunderbird IMAP/SMTP

Thunderbird extension for the Todo.txt application.