Message Composition

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Send Later Requires Restart

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

Rated 5 out of 5 stars (145)
72,832 users
Updated July 15, 2019

DL for Thunderbird Requires Restart

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

Rated 5 out of 5 stars (7)
271 users
Updated July 15, 2019

Owl for Exchange

Allows you to use your Exchange email accounts that use Outlook Web Access (OWA) with Thunderbird

Rated 5 out of 5 stars (10)
2,256 users
Updated July 8, 2019

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 (14)
5,121 users
Updated July 6, 2019

CategoryManager Requires Restart

Category manager for Thunderbird 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)
4,762 users
Updated July 5, 2019

Use BCC Instead C Requires Restart

This is a version of 'Use BCC Instead' updated for Thunderbird 64 and above.

It prevents you accidentally sending an email to a large number of recipients without hiding their addresses from each other by using BCC.

Not yet rated
1 user
Updated July 5, 2019

Shrunked Image Resizer Requires Restart

Make your photos smaller, so they don't take forever to email.

Rated 4 out of 5 stars (42)
7,126 users
Updated June 26, 2019

Mail Merge Requires Restart Featured

Create and Save or Send Multiple Individual and Personalized Messages from a Draft

Rated 5 out of 5 stars (172)
64,284 users
Updated June 19, 2019

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 (2)
302 users
Updated May 31, 2019

Reply to Multiple Messages Requires Restart

Add menu commands for replying to multiple messages at the same time.

Rated 5 out of 5 stars (7)
607 users
Updated May 27, 2019

FileLink Provider for Dropbox

Uploads your large attachments to your Dropbox instead of sending them by email. This uses Thunderbird's FileLink feature.

Rated 4 out of 5 stars (3)
420 users
Updated May 21, 2019

FileLink Provider for Box

Uploads your large attachments to your Box instead of sending them by email.

Not yet rated
0 users
Updated May 21, 2019

Send Later Button Requires Restart

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

Rated 4 out of 5 stars (3)
6,669 users
Updated May 17, 2019

Theme Quedox

Theme Quedox adventure. Mas información en la siguiente url. https://cruzdavid.com.

Not yet rated
0 users
Updated May 13, 2019

Flex Confirm Mail Requires Restart

Confirm mail address and attachments based on flexible rules.

Rated 3 out of 5 stars (5)
15,940 users
Updated April 25, 2019

AutoCopy_rebirth Requires Restart

Lightweight add-on that automatically copies any highlighted text to clipboard.

Rated 4 out of 5 stars (3)
14 users
Updated March 13, 2019

ReplyWithHeader Requires Restart

Outlook style headers and few goodies for Thunderbird & Postbox.

Rated 5 out of 5 stars (20)
3,696 users
Updated Feb. 23, 2019

Stop Ignoring Reply:To Requires Restart

Default "Reply" functionality pays attention to "Reply-To" in original email

Rated 5 out of 5 stars (9)
413 users
Updated Feb. 22, 2019

Emoji Requires Restart

Add emojis to your e-mails.

Rated 4 out of 5 stars (21)
12,129 users
Updated Feb. 1, 2019

Address bulk copy (アドレス一括コピー) Requires Restart

Thunderbird は Outlook のようにアドレス全選択からの「一括コピー」ができません。
それを実現するためのアドオンです。

Rated 5 out of 5 stars (6)
1,639 users
Updated Jan. 31, 2019