Message Composition

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EnForward

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.

Rated 5 out of 5 stars (5)
2,199 users

Color Text Compose Buttons

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.

Rated 4 out of 5 stars (19)
1,927 users

hubiC for Filelink

Add hubiC support to Thunderbird's Filelink feature.

Rated 4 out of 5 stars (11)
1,808 users

CryptoData

Easily and quickly to encrypt / decrypt:
Private messages via e-mail, blogs, social networks, forums, websites, images, etc
Support: Firefox, Thunderbird and SeaMonkey

New feature: CryptoPad (crypto-notepad)

Rated 5 out of 5 stars (6)
1,622 users

Flexible Identity

Selects an identity based on the recipients list when sending an email

Rated 4 out of 5 stars (24)
1,621 users

DL for Thunderbird

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

Rated 5 out of 5 stars (3)
1,575 users

Get before Send

Get messages for the account which is bound to the identity then send the message when you click the toolbar button or the menu item. If your SMTP sever authenticates using POP(IMAP) before SMTP, the extension is useful.

Rated 5 out of 5 stars (2)
1,247 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)
1,175 users

mms Auto Correct

AutoCorrect for the Compose window.

Rated 3 out of 5 stars (30)
815 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
769 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 3 out of 5 stars (2)
647 users

ReplyWithHeader

Outlook style headers and few goodies for Thunderbird & Postbox.

Rated 5 out of 5 stars (4)
491 users

random(signature)

Updates a given signature file in regular intervals.

Rated 4 out of 5 stars (56)
416 users

Send Later Button

A simple button to invoke the (already existing) send later functions.

Not yet rated
397 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 (3)
381 users

Send and Archive

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

Rated 5 out of 5 stars (8)
372 users

Macro Template No Restart

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

Rated 5 out of 5 stars (1)
349 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 (3)
339 users

MEGAbird

Add MEGA support to Thunderbird's Filelink feature.

Not yet rated
319 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)
313 users