Shows the Sender/Recipient Mailaddress in the Mail List. Normaly, only the Name is displayed, which is wrong on most Spam Mails. Now you also can clearly see which of your Mail Addresses was used, extremly usefull if you are using a chatch-all...
Allows copying attachments to the clipboard
Downloads new message headers (and bodies, if configured) immediately when Thunderbird detects new messages in an IMAP folder - that's more or less what the "download_on_biff" preference promises to do, but somehow fails to deliver...
Color-codes compose windows depending the active e-mail identity, to avoid sending messages from the wrong account.
Add a new unread-favorite-recent folders treeview.
This Thunderbird extension adds a button (plus keyboard shortcut) which allows for quickly switching between the 'view all'/'view unread' message filters. Moreover, if you are in the 'view unread' mode and you start...
Add Notes to messages. Notes are stored in a plaintext file, typically in your profile. The plaintext notes file can be stored elsewhere to enable sharing of notes across a...
Prompts you if it looks like you wanted to attach a file but didn't.
Adds 'Delete Mail Marked as Junk' to folders' right click...
Are you using mailing lists in Thunderbird ?
Do you forward a lot of mail ?
If so, this extension may be useful for you.