Message Composition

Subscribe

Tategaki

Tategaki allows vertical writing-mode on mail compose window.

Not yet rated
6 users
Updated May 26, 2016

ThunderHTMLedit

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.

Not yet rated
83 users
Updated May 17, 2016

Clippings

Save frequently-entered text for pasting later.

Rated 4 out of 5 stars (180)
49,690 users
Updated May 13, 2016

CategoryManager

Category manager for CardDav contacts, also allows to send an email to all members of a category (categories can be used as contact groups).

Rated 5 out of 5 stars (9)
2,533 users
Updated May 2, 2016

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)
2,167 users
Updated April 30, 2016

DL for Thunderbird

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

Rated 5 out of 5 stars (3)
1,843 users
Updated April 30, 2016

Send Later Button

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

Not yet rated
567 users
Updated April 29, 2016

Single Domain

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)
167 users
Updated April 26, 2016

BorderColors GT

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.

Rated 4 out of 5 stars (8)
4,564 users
Updated April 25, 2016

SmartTemplate4

SmartTemplate4 offers an easy way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every account as well as for the default (all email accounts). Also supports the Stationery Add-on.

Rated 5 out of 5 stars (49)
21,590 users
Updated April 20, 2016

Mail Merge Featured

Mass Mail and Personal Mail

Rated 5 out of 5 stars (142)
59,843 users
Updated April 19, 2016

ThunderPEC

ThunderPEC semplifica la gestione della Posta Elettronica Certificata (PEC) e delle comunicazioni PCT e FatturaPA in Thunderbird.

Rated 5 out of 5 stars (12)
18,853 users
Updated April 18, 2016

Emoji Menu

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

Rated 5 out of 5 stars (4)
3,487 users
Updated April 13, 2016

Send Later

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (47)
68,775 users
Updated April 12, 2016

Ethical signature

Add a button to the email composition toolbar, which lets you insert an ethical signature.

Not yet rated
39 users
Updated April 5, 2016

Toggle Word Wrap

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

Rated 4 out of 5 stars (38)
7,197 users
Updated March 22, 2016

Colored Recipient Type

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:.

Not yet rated
179 users
Updated March 21, 2016

Resubmit

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

Not yet rated
40 users
Updated March 18, 2016

X-Unsent support

Adds support for the X-Unsent header.

Rated 3 out of 5 stars (2)
107 users
Updated March 16, 2016

PennyPost

This extension makes it very easy to generate and attach stamps to outgoing mail. It also automatically detects and verifies stamps on incoming emails. The MBound algorithm requires a 16MB fixed table to work, HashCash is more CPU intense.

Rated 5 out of 5 stars (3)
32 users
Updated March 7, 2016