Message Composition

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Markdown Here Requires Restart

Write your email in Markdown, then make it pretty.

Rated 5 out of 5 stars (23)
8,772 users

Emoji Menu Requires Restart

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

Rated 4 out of 5 stars (6)
4,214 users

Toggle Word Wrap Requires Restart

Toggle word wrapping and PRE element wrapping in the message composition and HTML display windows, respectively.

Rated 4 out of 5 stars (40)
6,794 users

Flexible Identity Requires Restart

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

Rated 4 out of 5 stars (26)
1,679 users

Highlighter Requires Restart

Quickly highlight some text in Thunderbird message composing windows.

Rated 4 out of 5 stars (55)
10,197 users

Emoji Requires Restart

Add emojis to your e-mails.

Rated 5 out of 5 stars (3)
6,492 users

SmilieInserter Plus Requires Restart

Insert smilies in messages.

Rated 5 out of 5 stars (18)
3,549 users

Clippings Requires Restart

Save frequently-entered text for pasting later.

Rated 4 out of 5 stars (197)
35,532 users

Transliterator

As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.

Rated 5 out of 5 stars (78)
6,188 users

CryptoData Requires Restart

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

Rated 5 out of 5 stars (7)
1,644 users

Lovebird Requires Restart

Email organized around the people you care about.

Rated 3 out of 5 stars (3)
68 users

MALA Hindi Spell Checker by MCRPV, (Anurag Seetha) Requires Restart

MALA (Makhanlal) Hindi Shabd Shodhak to check Spelling of Hindi Unicode Text by Makhanlal Chaturvedi National University of Journalism & Communication, Bhopal, India. Chief Developer - Dr. Anurag Seetha. The program is Released Under the GNU GPL V 3

Not yet rated
7 users

Resubmit Requires Restart

(Re)submit multiple messages to a predefined recipient(s)

Not yet rated
54 users

Check Attachment before Send Requires Restart

Confirms to send a mail with any attachment.

Not yet rated
55 users

Attach from Clipboard Requires Restart

Create file attachments directly from the system clipboard.

Not yet rated
275 users

Single Domain Requires Restart

Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.

Rated 5 out of 5 stars (1)
230 users

RM: EXTERNAL: Requires Restart

Removes 'EXTERNAL: ' from the start of an email subject if it is preceded by 'RE:' or 'FWD:' (case insensitive). The removal is done after the 'Send' button is pressed.

Not yet rated
2 users

Edit Message Encoding Fallback Requires Restart

Fallback to a safe encoding, if you are replying to a message with unsupported encoding like UTF-16LE. (workaround for the Bug 961983)

Not yet rated
10 users

mms Auto Correct Requires Restart

AutoCorrect for the Compose window.

Rated 3 out of 5 stars (32)
836 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
876 users