ReplyWithHeader Requires Restart
Outlook style headers and few goodies for Thunderbird & Postbox.
Send Later Button Requires Restart
A simple button to invoke the (already existing) send later functions.
Add menu commands for replying to multiple messages at the same time.
Email signature for Thunderbird - WiseStamp Requires Restart
Switch Thunderbird email signatures. Supports Gmail, Yahoo, AOL & Outlook webmails. Youtube, Facebook, Twitter icons & more
Attach from Clipboard Requires Restart
Create file attachments directly from the system clipboard.
Flex Confirm Mail Requires Restart
Confirm mail address and attachments based on flexible rules.
Toggle Word Wrap Requires Restart
Toggle word wrapping and PRE element wrapping in the message composition and HTML display windows, respectively.
Extra Format Buttons Requires Restart
Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.
Custom Address Sidebar Requires Restart
Allow you to help address sidebar more useful.
One-by-One Forward Requires Restart
Highlight multiple emails, right-click, then select "One-by-One Forward". This extension will allow you to forward the selected emails, one-by-one, to the recipients you specify using your choice of attachment handling.
MultiTemplateLoader Requires Restart
Manages & applies multiple HTML templates when creating/replying messages.
Templates may be either local files or online links (http:// or ftp://). Up to 9 templates can be defined and easily switched, also using shortcut keys.
DL for Thunderbird Requires Restart
Allows to convert large attachments to links automatically without 3rd party providers.
hubiC for Filelink Requires Restart
Add hubiC support to Thunderbird's Filelink feature.
Reply As Original Recipient Requires Restart
Reply with the From: field set to the To: field from the original email.
Color Text Compose Buttons Requires Restart
Adds Text Color Buttons in Compose Toolbar and More: Pixel FontSize, Strikethough, Sub & Superscript, Lower & UpperCase. Also provide Tools: Insert iframe, Launch MathType, Maths & Greek Symbols, Load Template Variables and Duplicate Compose Window.
BorderColors GT Requires Restart
How many time you sent an email from your wrong email address?
This add-ons allows you assign a different color to the compose window border for each of your email addresses. So you can immediately view from what account are you writing.
Copy Message ID Requires Restart
Adds a button to the message view toolbar to copy the message ID to the clipboard. This is useful when sending email replies via the command line.
EnForward Requires Restart
Save your email into Evernote by forwarding it to Evernote email address.
Before you use it, you need to specify your Evernote email address (see the screenshot).
This function can be invoked by "Forward to Evernote" in the context menu.