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LookOut Requires Restart

LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).

Rated 4 out of 5 stars (158)
932 users

TbSync

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 (263)
60,887 users

MS Office 2003 JB Edition Requires Restart

MS Office 2003 Theme.

Rated 5 out of 5 stars (77)
284 users

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 (83)
1,901 users

OutlookAlike BETA Requires Restart

Makes Thunderbird looking like Outlook.

Rated 4 out of 5 stars (37)
16 users

LookOut+ Requires Restart

LookOut is a plugin which allows to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).

This version is a fix for Seamonkey 2.*.

Rated 4 out of 5 stars (5)
41 users

tzpush Requires Restart

Z-Sync to Thunderbird Addressbook
Will sync Thunderbird address book to Zentyal, Zarafa, Horde and outlook.com/hotmail.

Rated 4 out of 5 stars (20)
7 users

Unmangle Microsoft ATP Safelinks

Users of outlook.com and o365 who have Advanced Thread Protection enabled will have all URL's in emails changed to redirect them to an Microsoft filter before opening. This is a bad idea.

This plugin will change the URL back to the original value.

Rated 5 out of 5 stars (6)
699 users

ZNotes Requires Restart

Save everything you like. Simple text notes and pages downloaded from the internet, rich multimedia. Store any files and contacts from your address book with notes.

Rated 5 out of 5 stars (15)
3 users

Free/Busy Requires Restart

Publish free/busy calendar file (*.ifb) via ftp or to a file. View other people's free/busy info in meeting organizer window. Integrate Thunderbird and Outlook calendars without Exchange server.

Rated 3 out of 5 stars (14)
6 users

Simple Week View Requires Restart

A simple week view for Lightning, as in the print layout.

Rated 3 out of 5 stars (5)
3 users

Clean Subject Requires Restart

"Clean Subject" cleans the subject from multiple occurrences of subject prefixes such as ("Re: Re-2: Re:") and postfixes that are inserted by other clients. Words like "[SPAM]" can be cleaned as well. These prefixes can be defined in the preferences.

Rated 4 out of 5 stars (47)
36 users

Mail and Save Tab URLs Requires Restart

If you often share web page addresses (URLs) with others or save them in text file, bookmark, or copy to clipboard for your own reference, this extension will make your life easier!

Rated 4 out of 5 stars (10)
0 users

Winmail Opener Bridge Requires Restart

Opens attached winmail.dat by Winmail Opener automatically.

Not yet rated
2 users

CRM-Integration ITSP-PBX Mobile Exchange Requires Restart

Integration of FreePBX-Swiss and OMP24-CRM

Rated 5 out of 5 stars (1)
0 users

Redmond Revisited Requires Restart

An Outlook Express theme for...

Rated 5 out of 5 stars (4)
0 users

Peachphone : virtual phone (Android/iPhone) Requires Restart

http://peachphone.com/release/
Send SMS and MMS worldwide, Video from your webcam, video from Youtube, send photos, manage your contacts (Thunderbird, Outlook, MSN, Yahoo)

Rated 1 out of 5 stars (5)
0 users

Safe Links Cleaner

Clean up the display of links rewritten by Microsoft ATP Safe Links when reading and composing mail, so the original links can easily be viewed and copied, while retaining the rewritten addresses as the actual target of all links.

Rated 4 out of 5 stars (2)
109 users

Outlook/Teams Appointments

Get the hidden appointment from an email from outlook/teams as a .ics-file - Icon: https://fontawesome.com/

Rated 4 out of 5 stars (13)
4,956 users

Advanced Composer

Creates message templates with variable support, quote header in Ms Outlook style, signatures, custom attachment info for cloud files, and more.

Rated 4 out of 5 stars (9)
435 users