Privacy and Security
Paranoia Requires Restart
Check if your emails arrived TLS-encrypted (and which corporations were able to read it nevertheless)
Flex Confirm Mail Requires Restart
Confirm mail address and attachments based on flexible rules.
Adds a column for displaying the certificates Email address to the "Your Certificates" tab of the Certificate Manager
ThunderSec Requires Restart
ThunderSec is a security extension that provides several pieces of additional security functionality, including DNS-based Blackhole List (DNSBL), Realtime Blackhole Lists (RBL), DomainKeys Identified Mail (DKIM) and Sender Policy Framework (SPF).
Lock The Text Requires Restart
Encrypt your text data in browser before you submit it to a network
Mailsleuth Requires Restart
Mailsleuth is a add-on for Thunderbird that provides you a full email header analysis of any email in your Inbox. This add-on is designed to provide a report on the email headers on any email you choose from your inbox. MAJOR updates for Feb 2013!
DSN Settings 2 Requires Restart
Adds user interface settings for Delivery Status Notification (DSN) requests. This addon is useful for settings for Delivery Notification request and better experience with Notification Viewer addon.
Help you create element hiding rules for Pan to fight the text ads.
S/MIME Security for Multiple Identities Requires Restart
Adds S/MIME Security configuration to the multiple identities dialog.
Meanwhile this feater has been integrated into Thunderbird 3
Quick access to add-on functions from a toolbar panel: Options, (De)Activate, Details, Home page, Review page, Donation page, Uninstall, Restart application.
Sender Verification Anti-Phishing Extension Requires Restart
Protects you from phishing attacks by verifying the From: address domain name of emails as you read them. Sender Policy Framework (SPF) and DNS-based reputation lists are used.
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.
MailSentry IronPort Spam Reporter Requires Restart
Report spam and ham to IronPort - originally written for our MailSentry hosted IronPort customers, it can be used by anyone who has their email filtered by an IronPort appliance.
CookieFast Requires Restart
A small ergonomic 1-click cookie manager.
External Email Alert Requires Restart
Alerts user to confirm that it is ok to send an external email.
Logout Requires Restart
This extension adds "Logout" to the folders context menu.
After you "Logout" you will be asked again for passwords for this account (incoming and outgoing).
pass-manager Requires Restart
Replace integrated password managers storage with zx2c4's pass (www.passwordstore.org)
Do Not Save Password Requires Restart
Prevents to save passwords.
IsAdmin Requires Restart
Shows whether the application is running with admin privileges, using an icon in the status bar; useful if logged in as an administrator and you use privilege limitation tools such as DropMyRights, RunAs or Windows User Account Control.
PennyPost Requires Restart
This extension makes it very easy to generate and attach stamps to outgoing mail. It also automatically detects and verifies stamps on incoming emails. The MBound algorithm requires a 16MB fixed table to work, HashCash is more CPU intense.