Privacy and Security
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).
MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.
Identity Chooser helps you to always use the correct identity when composing a new email.
DKIM Verifier Featured
Verifies the DKIM-Signature of an e-mail.
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).
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.
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
OpenPGP message encryption and authentication for Thunderbird.
Remove comment, display name from addresses before sending mail.
This add-on is a fork of Auto Address Cleaner.
Identity Select Requires Restart
This extension allows you to choose the identity of your new email from a popup menu directly from the Write button. This feature behaves in a similar manner as the Get Mail pulldown menu. In addition, the default behavior of the Write button is...
CapsKiller Requires Restart
Caps Killer is a protection against newbies using caps in their mails.
Batch Copy Requires Restart
Batch Copy creates a local copy of your IMAP account, copies all messages and maintains folder structure. Batch Copy can run incrementally to copy only new messages.
Diese Erweiterung überprüft ungelesene E-Mails auf Spoofingversuche. Die E-Mails werden mithilfe von fünf unterschiedlichen Tests untersucht um deren Legitimität festzustellen. Die Tests werden einzeln erklärt auf der Einstellungsseite.
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.
MDN Extended Requires Restart
Allows the recipient of a message to send a return receipt (MDN: Message Disposition Notification) on message deletion. This addon is usefull for better experience with Notification Viewer addon.
KDE5 Wallet password integration Requires Restart
This extension enable passwords and form logins to be stored in KDE5 Wallet
Key Manager Requires Restart
KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation
Clear IMAP Local Cache Requires Restart
Clears IMAP local cache on startup.
Trueblock Plus Requires Restart
Trueblock Plus is a fork of the Adblock Plus extension for blocking unwanted advertisements on the web. This fork provides the exact same features as Adblock plus, with the unpopular, unwanted "acceptable ads" (non-)feature turned off by default.
DSN Settings Requires Restart
Adds user interface settings for Delivery Status Notification (DSN) requests. This addon is usefull for settings for Delivery Notification request and better experience with Notification Viewer addon.