Message Composition

Subscribe

DL for Thunderbird

Allows to convert large attachments to links automatically without 3rd party providers.

Rated 5 out of 5 stars (2)
1,476 users

Extra Format Buttons

Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.

Rated 5 out of 5 stars (3)
1,464 users

SubSwitch

Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.

Rated 4 out of 5 stars (6)
1,388 users

CryptoData

Easily and quickly to encrypt / decrypt
For users: private messages via e-mail, blogs, social networks, forums, etc.
For webmasters: websites, images, photos, etc.
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (4)
1,133 users

CategoryManager

Category manager for CardDav contacts, also allows to send an email to all members of a category.

Rated 5 out of 5 stars (6)
886 users

Emoji Menu

Adds the ability to easily insert emojis into your composed messages in Thunderbird.

Rated 4 out of 5 stars (1)
792 users

mms Auto Correct

AutoCorrect for the Compose window.

Rated 3 out of 5 stars (27)
737 users

Address Widget Lines

Address Widget Lines provides the ability to select the number of address lines to display in the message compose window.

Rated 5 out of 5 stars (18)
709 users

random(signature)

Updates a given signature file in regular intervals.

Rated 4 out of 5 stars (55)
493 users

Consigna para Filelink

Plugin para subir ficheros a Consigna (Junta de Andalucía) de forma automática desde Thunderbird.
Está ideado para el intercambio de ficheros de gran tamaño. Es un espacio de almacenamiento temporal y con algunas restricciones de acceso opcionales.

Rated 5 out of 5 stars (1)
462 users

Send and Archive

Adds a button to send an email and archive the original message.

Rated 5 out of 5 stars (8)
375 users

Attachemnt Encoding Detector

To detect file encoding of attachments, this forces to Thunderbird to use an encoding detector for a specific locale instead of the generic one.

Not yet rated
342 users

Macro Template No Restart

Macro Template is to replace mail templates with macros for date formatting.

Rated 5 out of 5 stars (1)
309 users

Filemail Attachments

With Filemail Thunderbird Add-on you can send large files directly from Mozilla Thunderbird using Filemail. Dec 2014: The 100 first people can sign up for a free account here: http://bit.ly/1z2f94L

Rated 3 out of 5 stars (1)
290 users

replyTo

Adds a menuitem to the Mail context Menu to Reply to a different Mailadress

Not yet rated
282 users

IMAP Draft Unread

This is a Thunderbird addon that lets you customize the behavior of the IMAP draft unread messages. No more new mail notifications for your drafts!!

Rated 3 out of 5 stars (1)
248 users

Insert Link from Local File

Inserts links from local files via drag and drop on the composition window.

Rated 3 out of 5 stars (2)
242 users

Reply to All as Cc

Send a reply for recipients as CC except the sender, when you do "Reply to All".

Rated 4 out of 5 stars (2)
168 users

FastCC

A Thunderbird extension that let you switch to cc: with the ALT+CTRL+C keyboard shortcut!

Rated 5 out of 5 stars (1)
150 users

Highlight External Addresses

This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. External addresses are highlighted in orange as a reminder.

Rated 4 out of 5 stars (1)
122 users