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Thunderbird Conversations Requires Restart

This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.

Rated 4 out of 5 stars (453)
23,313 users
Updated Dec. 10, 2019

Display Mail User Agent T Requires Restart

Displays the mail program with which the selected mail was written

*This addon is compatible with Thunderbird after Web Extesnsions support. Since development and operation check are done on Daily, it may not work on normal Thunderbird.

Rated 5 out of 5 stars (2)
534 users
Updated Dec. 10, 2019

ReminderFox Requires Restart

ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.

Rated 4 out of 5 stars (537)
12,976 users
Updated Dec. 8, 2019

Send Later Requires Restart Featured

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

Rated 5 out of 5 stars (156)
81,787 users
Updated Dec. 8, 2019

EDS Calendar Integration Requires Restart

Integrates calendars events with Gnome clock applet
Version 0.7 doesn't work with EDS 3.33.2 (Ex Ubuntu 19.10).
Version 0.8 is currently available via Github > Release page.

Rated 4 out of 5 stars (11)
674 users
Updated Dec. 8, 2019

ExQuilla for Exchange Requires Restart Featured

Thunderbird email accounts connecting to Microsoft Exchange Web Services.

Rated 4 out of 5 stars (107)
15,723 users
Updated Dec. 8, 2019

Calendar Tweaks Requires Restart

Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.

Rated 4 out of 5 stars (72)
10,740 users
Updated Dec. 8, 2019

Encrypt if possible Requires Restart

Sets message security option "encrypt message", if valid X509 certificates are found for all recipients.

Rated 5 out of 5 stars (20)
1,347 users
Updated Dec. 8, 2019

Phoenity Buttons Requires Restart

Adds some toolbar buttons using phoenity icons.
Displays message headers more compact (2 lines).

Rated 4 out of 5 stars (12)
1,772 users
Updated Dec. 8, 2019

Received Requires Restart

Displays the "Received" header parsed with a regular expression.

Rated 5 out of 5 stars (2)
51 users
Updated Dec. 8, 2019

Toggle Headers Requires Restart

Allows to switch between the normal header view and viewing all headers when viewing a message by using a keyboard shortcut (H).

Rated 4 out of 5 stars (7)
819 users
Updated Dec. 8, 2019

Check and Send Requires Restart

Check the message contents and addresses before you send the message...

Rated 4 out of 5 stars (31)
20,136 users
Updated Dec. 8, 2019

TbSync Requires Restart Featured

TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.

Rated 5 out of 5 stars (76)
30,144 users
Updated Dec. 6, 2019

Owl for Exchange

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

Rated 4 out of 5 stars (32)
27,116 users
Updated Dec. 6, 2019

Account Colors Requires Restart

Associates user-defined colors with POP3/IMAP accounts and identities. Applies these colors to accounts, identities, folders, message list, message headers and compose headers. Users will always know which accounts/identities they are working with.

Rated 4 out of 5 stars (122)
14,787 users
Updated Dec. 4, 2019

Priority Switcher Requires Restart

Change priority of the received messages from the toolbar button and the context menus...

Rated 4 out of 5 stars (22)
1,075 users
Updated Dec. 4, 2019

Quicktext Requires Restart

Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.

Rated 4 out of 5 stars (358)
107,544 users
Updated Dec. 4, 2019

Resubmit Requires Restart

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

Rated 5 out of 5 stars (3)
68 users
Updated Dec. 2, 2019

CardBook Requires Restart

A new Thunderbird address book based on the CardDAV and vCard standards.

Twitter: @CardBookAddon

Rated 4 out of 5 stars (226)
52,485 users
Updated Dec. 2, 2019

Lightning Requires Restart

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.

Rated 3 out of 5 stars (2,020)
7,401,570 users
Updated Dec. 2, 2019