Check the message contents and addresses before you send the message...
Persistent sticky notes for Thunderbird associated to mails.
This is a port to Thunderbird >= 3 and Seamonkey >= 2 based on XNote 2.1.0 ( https://addons.mozilla.org/en-US/thunderbird/addon/3093 ) with bugfixes and additional features.
It adds a button that can be put in toolbars and that open the addressbook in a new tab
Adds some options to print messages and addressbooks
Powerful message searching through expressions. Type "from:fred to:tom" to see all messages from Fred to Tom in the current view. Support 'regular expressions' and 'click to search'.
Adds extension options dialogs to the Tools or Titlebar menu and includes toolbar icon.
Add arrow buttons for rotating among folder views, and switch to "All Folders" view when hovering over the folder pane during drag & drop.
Adds a summary of mail accounts and folders to replace the account central pane and the empty folder preview
Quickly highlight some text in Thunderbird message composing windows.
Tasks and emails management in a Thunderbird extension. tasks are stored in emails folder and it's possible to link an email to a task.
See all in one, emails and tasks (no more pain to synchronize a task manager).
Detects language while emails are being composed and automatically selects the best dictionary available.
Adds many new mail filter actions - launch a file, suppress notification, remove star or tag, mark replied or unread, copy as "read", append text to subject.