Sieve Script Editor

✉️ 📤 "Nextcloud for Filelink" is a Thunderbird extension which makes it easy to send large attachments with Thunderbird by uploading them first to a Nextcloud server and by then inserting the link into the body of your email.

Remove Duplicate Messages

MailExtension to talk to keepassxc

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

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

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

Outlook style headers and few goodies for Thunderbird

Thunderbird add-on to display spam scores according to mail headers. Supports spam/ham score headers of Rspamd and SpamAssassin. The add-on adds a column with the overall spam score to the mail list view and shows details of any matched spam/ham rule.

ThunderSec is a security plugin for Mozilla Thunderbird that creates several pieces of additional security functionality, including DNSBL, RBL, SURBL, DKIM and SPF.

This addon adds awesome statistics to your beloved Thunderbird!

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

Thunderbird filelink plugin

Thunderbird extension for the Todo.txt application.

Easily export your Thunderbird emails to Joplin.

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

Source of the Mozilla Thunderbird extension "Correct Identity"

This is a Thunderbird addon that adds some magic to the folder list columns. Check the addon website for more info...

Extensions / Add-Ons for Mozilla Firefox and Mozilla Thunderbird

BiDi Mail UI: Thunderbird extension for improved right-to-left language support