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Clear IMAP Local Cache

Clears IMAP local cache on startup.

Rated 5 out of 5 stars (1)
22 weekly downloads

Mailsleuth

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!

Rated 3 out of 5 stars (7)
21 weekly downloads

Security Settings from Address Book

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)
19 weekly downloads

XML Digital Signature Tool

XML Digital Signature Tool is a Firefox add-on for processing Digital Signature in XML documents
(Please read the installation instruction in the "Developer Comments" section before downloading)

Rated 4 out of 5 stars (3)
18 weekly downloads

External Email Alert

Alerts user to confirm that it is ok to send an external email.

Rated 3 out of 5 stars (6)
18 weekly downloads

Do Not Save Password

Prevents to save passwords.

Rated 5 out of 5 stars (1)
17 weekly downloads

PennyPost

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.

Rated 5 out of 5 stars (3)
16 weekly downloads

Thunderbird-DontRestoreTabs

Allows the user not to restore tabs at startup in Thundertbird

Not yet rated
15 weekly downloads

abusix Spam reporter

The abusix Spam Reporter enables you to forward and report spam to the abusix blackhole.mx systems directly from Thunderbird (free of charge). Thus, you help professionals and security vendors to fight spam much more effectively at the source.

Rated 4 out of 5 stars (8)
15 weekly downloads

Sender Verification Anti-Phishing Extension

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.

Rated 4 out of 5 stars (20)
15 weekly downloads

Bitmask Thunderbird Extension

This extension includes:

* A wizard for creating Bitmask email accounts on Thunderbird.
* Cache prevention for Bitmask accounts.

Not yet rated
13 weekly downloads

DSN Settings

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 4 out of 5 stars (1)
10 weekly downloads

IsAdmin

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.

Rated 5 out of 5 stars (10)
10 weekly downloads

Sensitivity Header

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
This allows the user to select Private / Personal / Company-Confidential (or none) for an outgoing message.

Rated 4 out of 5 stars (1)
9 weekly downloads

Channel Guard

Channelguard disables plugins and protocol handlers to ensure maximum security against side-channel attack.

Rated 4 out of 5 stars (2)
9 weekly downloads

Check Attachment before Send

Confirms to send a mail with any attachment.

Not yet rated
8 weekly downloads

Disable About Something

Provides ability to disable "about:*" pages by the configuration.

Rated 5 out of 5 stars (1)
8 weekly downloads

pass-manager

Replace integrated password managers storage with zx2c4's pass (www.passwordstore.org)

Rated 3 out of 5 stars (1)
8 weekly downloads

Sensitivity Header + SPX

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
Forked from another add-on developed by ff_bob, added SPX header for Sophos security appliances

Not yet rated
7 weekly downloads

SecondOpinion

This extension implements a convenient way to check and upload attachments against VirusTotal.com

Rated 5 out of 5 stars (1)
7 weekly downloads