Message Composition

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Automatic Dictionary

Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.

Rated 5 out of 5 stars (24)
3,284 users

SmilieInserter Plus Requires Restart

Insert smilies in messages.

Rated 5 out of 5 stars (19)
3,258 users

Grammar Checker Requires Restart

Checks grammar using LanguageTool.

Rated 3 out of 5 stars (5)
2,855 users

AVIM Requires Restart

Vietnamese-language input method editor (IME). Type diacritics directly into any Web page, Web app, or dialog box. Convenient, comprehensive, secure.
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Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, hộp thoại.

Rated 5 out of 5 stars (34)
2,423 users

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.

Rated 4 out of 5 stars (20)
2,287 users

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.

Rated 4 out of 5 stars (6)
2,206 users

hubiC for Filelink Requires Restart

Add hubiC support to Thunderbird's Filelink feature.

Rated 4 out of 5 stars (14)
2,079 users

ThunderHTMLedit Requires Restart

Thunderbird HTML editor. This add-on adds a HTML tab to the composition window where you can see and edit the HTML source of the message.

Rated 5 out of 5 stars (4)
2,002 users

DL for Thunderbird Requires Restart

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

Rated 5 out of 5 stars (3)
1,856 users

Flexible Identity Requires Restart

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

Rated 4 out of 5 stars (26)
1,641 users

Consigna para Filelink Requires Restart

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)
1,313 users

ReplyWithHeader Requires Restart

Outlook style headers and few goodies for Thunderbird & Postbox.

Rated 4 out of 5 stars (8)
1,264 users

SubSwitch Requires Restart

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 (7)
1,191 users

Get before Send Requires Restart

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)
1,181 users

MEGAbird Requires Restart

Add MEGA support to Thunderbird's Filelink feature.

Rated 4 out of 5 stars (6)
989 users

Attachemnt Encoding Detector Requires Restart

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
854 users

mms Auto Correct Requires Restart

AutoCorrect for the Compose window.

Rated 3 out of 5 stars (30)
846 users

Attach from Clipboard Requires Restart

Create file attachments directly from the system clipboard.

Rated 5 out of 5 stars (2)
804 users

Colored Recipient Type Requires Restart

Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.Customize background-color of the recipient address fields for each recipient types of To:, Cc:, Bcc:.

Rated 4 out of 5 stars (3)
672 users

MultiLDAP2 Requires Restart

Based on TrustedBird/MiliMail work. Patched to work with lastest Thunderbird.
Permits to use several LDAP directories simultaneously for address autocompletion.

Rated 5 out of 5 stars (1)
476 users