Extensions by Name
Reply In Group Requires Restart
Adds "Reply In Group" and "Reply to sender" toolbar buttons to the main window. So it's easier to reply in Usenet...
Reply Monitor Requires Restart
Keep track of your emails and replies (Lightning is required).
Note: the name of this add-on has been changed to Reply Monitor because the previous name is a registered trademark.
Reply to All as Cc Requires Restart
Send a reply for recipients as CC except the sender, when you do "Reply to All".
Reply To All Reminder Requires Restart
Asks for confirmation when "Reply" instead of "Reply to All" is pressed on an email with multiple recipients.
replyTo Requires Restart
Adds a menuitem to the Mail context Menu to Reply to a different Mailadress
ReplyWithHeader Requires Restart
Outlook style headers and few goodies for Thunderbird & Postbox.
Report Requires Restart
Печать реестра входящих и исходящих сообщений, полученных/переданных по электронной почте.
Report Spam Requires Restart
Report spam is a Thunderbird plugging to report antispam errors. A new button is added to header tool bar in order to signal a message as a false positive (a ham that is tagged as spam) or a false negative (a spam not tagged as spam).
ResetRec Requires Restart
ResetRec allows you to reset the recipient list.
Resize Header Requires Restart
An addon to let you resize the message header pane.
The "Responsible Blocker" arrives to save the Internet, this extension blocks all those annoying ads, but allows only small and acceptable ads, so the websites you like can continue online.
The "Responsible Blocker" arrives to save the Internet
"Restart" menu and button, with configurable shortcut key.
Restart the current application, as you might need to do after installing a new extension or theme.
Restart application Requires Restart
Restart the application with one click (or Ctrl Shift Z)
Restart Thunderbird Requires Restart
Restart Thunderbird with ease.
This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.
Resubmission Folder Requires Restart
View the most important e-mails sorted after specified resubmission date and filter them. Do the same with sent e-mails to see which recipient has to be reminded to answer your e-mail.
Only tested on Windows!
Some bugs not fixed yet!
Resubmit Requires Restart
(Re)submit multiple messages to a predefined recipient(s)
This addon adds an entry in the right-click menu which re-threads selected messages together (groups selected messages into the same thread)". This is done by _modifying_ messages; the author of the addon declines any responsibility for data loss.