Privacy and Security
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
Securely encrypt and upload large attachments to any Send service instance (formerly Firefox Send).
Confirm E-mail address before sending mail
Check the message contents and addresses before you send the message...
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).
Confirm mail address and attachments based on flexible rules.
(This project was renamed from "Flex Confirm Mail" to "FlexConfirmMail", due to a branding reason.)
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).
Helper tool to migrate your keys and important settings from Enigmail to Thunderbird 78.
Remove comment, display name from addresses before sending mail.
This add-on is a fork of Auto Address Cleaner.
Identity Chooser helps you to always use the correct identity when composing a new email.
MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.
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.
Auto Password Registerer Requires Restart
Registers given passwords to Firefox/Thunderbird's password manager automatically.
Ever sent mail from the wrong email address because you forgot to select the correct identity?
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.
TORPEDO ist ein Tool zum Erkennen von betrügerischen Links (Phishing). Bewegen Sie die Maus über einen Link in einer Email. TORPEDO zeigt Ihnen die tatsächliche Webadresse in einem Tooltip an und hilft Ihnen, diese zu untersuchen.
Rspamd spam filtering system score visualization.
Copy Folder Requires Restart
The missing Thunderbird "copy folder" feature! Copy folders or entire POP/IMAP accounts recursively to any location while maintaining folder structure.
Asks for the master password at startup (fixes multiple password prompt)