Privacy and Security

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Flex Confirm Mail

Confirm mail address and attachments based on flexible rules.

Rated 4 out of 5 stars (10)
9,952 users

Confirm-Address

Confirm E-mail address before sending mail

Rated 4 out of 5 stars (67)
26,236 users

Check and Send

Check the message contents and addresses before you send the message...

Rated 4 out of 5 stars (42)
16,747 users

Auto Password Registerer Requires Restart

Registers given passwords to Firefox/Thunderbird's password manager automatically.

Rated 5 out of 5 stars (2)
1,690 users

Auto Address Cleaner T

Remove comment, display name from addresses before sending mail.

This add-on is a fork of Auto Address Cleaner.
https://addons.thunderbird.net/thunderbird/addon/auto-address-cleaner/

Rated 5 out of 5 stars (4)
5,492 users

DKIM Verifier Featured

Verifies the DKIM-Signature of an e-mail.

Rated 4 out of 5 stars (30)
12,420 users

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.

Rated 4 out of 5 stars (9)
24 users

X-Spam-Score Column Requires Restart

Adds a column for the X-Spam-Score header.

Rated 5 out of 5 stars (1)
14 users

EuropeanMX Spam Reporter

Train your EuropeanMX filter by reporting unrecognized spam back to us.

Rated 3 out of 5 stars (3)
277 users

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.

Rated 5 out of 5 stars (1)
0 users

Steganografi menggunakan PIT dan PRNG Requires Restart

Add-on penyisipan pesan pada gambar menggunakan PIT dan PRNG

Not yet rated
1 user

Key Manager Requires Restart

KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation

Rated 3 out of 5 stars (21)
0 users

Secure Addressing Requires Restart

This add-on provides features to avoid sending emails to wrong addresses. Key features are a confirmation window of recipient's addresses upon sending, name and affiliation look up at mail composition and main windows, and safe auto completion.

Rated 4 out of 5 stars (31)
356 users

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...

Rated 4 out of 5 stars (10)
0 users

Security Settings from Address Book Requires Restart

Sets message security (sign/encrypt) when sending or saving messages based on recipients' address book entry's field "Custom1".

Rated 5 out of 5 stars (2)
31 users

Confirm-Address2 Requires Restart

Confirm E-mail addresses before sending mail.
This is forked from https://github.com/Meatian/confirm-address and works with Thunderbird 68.

Rated 5 out of 5 stars (2)
143 users

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.

Rated 5 out of 5 stars (2)
3 users

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.

Rated 3 out of 5 stars (2)
33 users

KeePass Helper Requires Restart

Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.

Rated 4 out of 5 stars (40)
16 users

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).

Rated 4 out of 5 stars (7)
16 users