Register or Log in
Other Applications

Add-ons

Extensions
Themes
- Most Popular
- Top Rated
- Newest
- Abstract
- Causes
- Fashion
- Film and TV
- Holiday
- Music
- Nature
- Other
- Scenery
- Seasonal
- Solid
- Sports
- Websites
Want more customization? Try Complete Themes
Collections
More…

Welcome to Thunderbird Add-ons.

Add extra features and styles to make Thunderbird your own.

Close

On the go?

Check out our Mobile Add-ons site.

Close

Explore

Featured
Most Popular
Top Rated

Categories

Appearance and Customization
Calendar and Date/Time
Chat and IM
Contacts
Folders and Filters
Import/Export
Language Support
Message Composition
Message and News Reading
Miscellaneous
Privacy and Security
Tags

Privacy and Security

Subscribe

Sort by:

Featured
Most Users
Top Rated
Newest
More

DKIM Verifier Featured

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (49)

20,847 users

To create your own collections, you must have a Mozilla Add-ons account.

Create an Add-ons Account

or log in to your current account

get to know add-ons
About
Blog
Developer Hub
Forum

Other languages

Privacy Policy | Report Trademark or Copyright Infringement | Legal Notices | Report Misuse of Thunderbird Trademark | Report a bug

Except where otherwise noted, content on this site is licensed under the
Creative Commons Attribution Share-Alike License v3.0 or any later version.