Add-ons
Privacy and Security
Sort by:
WarnAttachment
WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.
SPAMBEE
Report any unsollicited email (SPAM, Phishing, ...) to SPAMBEE.
Get an alert if you open an email containing a URL already known as fraudulent.
All reports are anonymized, no registration is required.
Signal Spam
Add simple functions to report spams or phishing to Signal Spam by one click.
The add-on will also alert you if you open a fraudulent e-mail (phishing).
Thunderbird Send
[IMPORTANT] This is a pre-release version Thunderbird Send. We will gradually open it for beta testing.
This add-on is built and maintained by your friends at Thunderbird.
Stay tuned to updates on thunderbird.net
Thunderbird Send [stage]
[Alpha Testing] Thunderbird send allows sending and receiving end to end encrypted files.
This add-on is undergoing testing and not yet available to the general public.
Logout
This extension adds "Logout" to the folders/accounts context menu.
After you "Logout" you will be asked again for passwords for this account (incoming and outgoing) without the need to restart thunderbird.
Clear History Button
keepassxc-mail
Link Check
フィッシングメールの対策として
主に、メール内のリンク先のドメインをチェックし、
安全性を確認する。
Check the domain of the link in the email.
PhishNet
Mail Merge
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
CrossBorderScam-Canceler
This add-on (CrossBorderScam-Canceler) filters fraudulent emails by focusing on the location of the received email and analyzing the header information of the opponent's email and the links in the email body.(view in English, Japanese or German)
Allow HTML Temp
Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).
Correct Identity
Ever sent mail from the wrong email address because you forgot to select the correct identity?
DKIM Verifier
Junk Mail ByeBye
This extension identifies and protects you from spam emails, phishing emails, and other unwanted messages. It is primarily targeted towards filtering out spam in Japanese.
FlexConfirmMail
Confirm mail address and attachments based on flexible rules.
This edition will have incompatible changes. Another edition for enterprise users with less changes:
https://addons.thunderbird.net/thunderbird/addon/flex-confirm-mail-stable/
Custom Headers View
Display custom email headers in the mail header toolbar. This extension allows you to make visible specific headers in the toolbar, like received, date, DuckDuckGo's duck-original- headers to show the sender's email in the original format, etc.
FlexConfirmMail Stable
Confirm mail address and attachments based on flexible rules.
This is enterprise edition with less updates. Another edition for regular users:
https://addons.thunderbird.net/thunderbird/addon/flex-confirm-mail/
Duck Email Converter
Convert your forwarding email and your DuckDuckGo Email Protection username to an email ready to be written to. Supports [at] and [dot] formats. The DuckDuckGo name, logos, trade dress, and other brand elements are trademarks of Duck Duck Go, Inc.
To create your own collections, you must have a Mozilla Add-ons account.
