MagicSLR extends functions and buttons to get and send messages. Many users missed a combined "Get/Send" button in Thunderbird. MagicSLR provides this button and more.
Birthday Reminder reminds of upcoming birthdays for all contacts in Thunderbird's address book. Supports Lightning, reminders and even Google Calendar :-)
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
Ever sent mail from the wrong email address because you forgot to select the correct identity in the compose window?
Now you can export your messages in a smarter way! You can export all folders and subfolder esaily from your local folder or from your IMAP...
Auto Zip Attachments allows you to easily compress (zip) attachments.
Copy and paste a name, phone number, address or other text from your Thunderbird address book quickly, with just a single menu click.
This add-on provides a few new ways to keep Thunderbird clean.
Maximize message pane by collapsing the thread pane. You can read a message in larger area without opening a new message window...
Allows to place a copy of sent messages (aka FCC) into the currently active folder or any other folder you choose, when you create the message. Usually the copies are placed into the 'Sent' folder. For replies, you may also move the original message.
"Clean Subject" cleans the subject from multiple occurrences of subject prefixes such as ("Re: Re-2: Re:") and postfixes that are inserted by other clients. Words like "[SPAM]" can be cleaned as well. These prefixes can be defined in the preferences.
This extension adds a menu option (and a toolbar button) to compose an email "with attachments"...