Enigmail, extension to the mail client of Mozilla Thunderbird and Mozilla Seamonkey

Enigmail is an extension to the mail client of Mozilla Thunderbird and Mozilla Seamonkey which allows users to access the authentication and encryption features provided by GnuPG (see screenshots).

Enigmail is open source and dually-licensed under the GNU General Public License and the Mozilla Public License.

You can download and install Enigmail from the Download page. See the Help page for post-installation instructions.
Enigmail is an email plugin. It cannot be run by itself.
You need a supported email client, the GNU Privay Guard (GnuPG), and a little patience. You may also need to install the proper Enigmail language pack.
Complete installation instructions can be found in the Quick start guide.

Main Features

• Encrypt/sign mail when sending, decrypt/authenticate received mail
• Support for inline-PGP (RFC 2440) and PGP/MIME (RFC 3156)
• Per-Account based encryption and signing defaults
• Per-Recipient rules for automated key selection, and enabling/disabling encryption and signing
• OpenPGP key management interface

See the Features page for a full list of Enigmail's features.
Enigmail is cross-platform like all Mozilla products, although binaries are supplied only for selected platforms on this website. Enigmail uses inter-process communication to execute command-line versions of GnuPG to carry out encryption/authentication.

Screenshots

(Taken from Enigmail version 0.95.3)

OpenPGP menu and Main Thunderbird window with Decrypt button

OpenPGP menu and Compose window with OpenPGP Security button

Enigmail Preferences

Enigmail per-account Settings

Enigmail Downloads

Please Note:

• New users should read the installation instructions first.
• Enigmail does not install GnuPG for you. You need to do that yourself.
• If you have any problems, please check the FAQ.
• Some users may want to check the OpenPGP signature
• And don’t forget to check the Help Page for HOWTOs, user guides, and more.

• 01/05/2008 The new website has been launched.
  
• 01/03/2008 Enigmail v0.95.6 has been released. This release fixes a signature verification bug and several problems with localized builds.
  
• 10/27/2007 Enigmail v0.95.5 has been released. This release fixes a bug leading to garbled PGP/MIME messages.
  
• 10/17/2007 Enigmail v0.95.4 has been released. This release fixes an incomaptibility with GPGOL.
  
• 08/04/2007 Enigmail v0.95.3 has been released. This release fixes an incomaptibility with gpg4win v1.1.1
  
• 07/01/2007 Enigmail v0.95.2 has been released. This release contains again more languages
  
• 06/25/2007 Enigmail v0.94.4 has been released. This release fixes a compatibility issue with Thunderbird 1.5.0.12
  

• 06/07/2007 Enigmail v0.95.1 has been released. This release contains many more languages
  
• 04/13/2007 Enigmail v0.95.0 has been released. Simplified preferences for non-advanced users added
  
• 03/06/2007 Important Security fix for Enigmail. A security bug detected by Core Security Technologies has been fixed in Enigmail v0.94.3.
  
• 01/11/2007 Enigmail v0.94.2 has been released. A crash bug that could affect security has been fixed.
  
• 08/06/2006 Enigmail v0.94.1 has been released. Added support for signing attachments with inline-PGP.
  
• 01/11/2006 Enigmail v0.94.0 has been released. Many fixed bugs for Thunderbird 1.5.
  
• 12/10/2005 Enigmail v0.93.2 has been released. Fixed bug with attachments and inline PGP.
  
• 11/28/2005 Enigmail v0.93.1 has been released. Better compatibility with Thunderbird 1.5.
  
• 10/02/2005 Enigmail v0.93.0 has been released. New setup wizard for beginners added.
  
• 09/11/2005 A security bug has been detected in Enigmail. Users are adviced to upgrade to v0.92.1 as soon as possible.
  
• 06/20/2005 Linux Magazine published Patrick and Olav's article on eMail security using Thunderbird and Enigmail.
  
• 06/11/2005 Enigmail v0.92.0 has been released. New support for OpenPGP SmartCards
  
• 03/27/2005 Enigmail v0.91.0 has been released. New support for OpenPGP: MIME header
  
• 03/12/2005 Enigmail v0.90.2 has been released. Use this version for Thunderbird 1.0.2.
  
• 02/12/2005 Enigmail v0.90.1 has been released.
  
• 01/10/2005 NewsForge: Securing Thunderbird email with OpenPGP
  
• 01/05/2005 Enigmail v0.90.0 has been released. Complete OpenPGP key management
  

• 12/18/2004 Enigmail v0.89.6 has been released. Fixed compatibility issued with GnuPG 1.4
  
• 12/05/2004 Enigmail v0.89.5 has been released. Enhanced OpenPGP key management
  
• 11/08/2004 Thunderbird with Enigmail on OS/2 Warp!
  
• 11/07/2004 Enigmail v0.89.0 has been released. New OpenPGP key management frontend
  
• 09/15/2004 Enigmail v0.86.1 has been released. Fixed improper decoding of Umlauts and non-ASCII characters
  
• 08/30/2004 Enigmail v0.86.0 has been released. Extended signature information in message preview header and some bug fixes.
  
• 07/24/2004 Enigmail v0.85.0 has been released. Lots of fixed bugs.
  
• 06/29/2004 Enigmail v0.84.2 has been released. New feature for downloading missing keys when sending messages.
  
• 06/06/2004 Enigmail v0.84.1 has been released. Contains a better dialog for per recipient settings and some bug fixes.
  
• 05/08/2004 Enigmail v0.84.0 has been released. New user friendly frontend for per-recipient encryption settings.
  
• 04/05/2004 Enigmail v0.83.6 has been released. New backend support for per-recipient encryption settings.
  
• 03/14/2004 Enigmail v0.83.5 has been released.
  
• 02/12/2004 Enigmail v0.83.3 has been released.
  
• 02/04/2004 Enigmail v0.83.2 has been released.
  
• 01/22/2004 Enigmail 0.83.1 has been released. This version works with the latest Thunderbird 0.5a release.
  

• 15/01/2004 Enigmail 0.83.0 has been released. Enhanced user interface for message composition, lots of bugs fixed
  
• 12/30/2003 Enigmail 0.82.6 and 0.76.8 have been released. They avoid triggering a Mozilla bug that causes frequent crashes at startup
  
• 12/15/2003 Enigmail 0.82.5 has been released. Adds support for 'sign only encrypted messages'
  
• 12/03/2003 Enigmail 0.82.4 has been released. Supports Mozilla 1.6b and Thunderbird 0.4
  
• 11/07/2003 Enigmail 0.82.2 has been released
  
• 11/03/2003 Enigmail 0.82.1 has been released for Mozilla 1.x. Provides the same user interface as for Thunderbird
  
• 10/29/2003 Enigmail 0.82.0 has been released. Contains a reworked preferences dialog and several bug fixes
  
• 10/6/2003 Enigmail 0.81.7 has been released. Contains a new encryption settings dialog for message composition
  
• 9/8/2003 Enigmail 0.81.6 and 0.76.7 have been released to fully support GnuPG 1.2.3
  
• 8/29/2003 Bugfix versions Enigmail 0.81.4 and 0.76.6 have been released
  
• 8/10/2003 Bugfix versions Enigmail 0.81.3 and 0.76.5 have been released
  
• 7/30/2003 Bugfix versions Enigmail 0.81.2 and 0.76.4 have been released
  
• 7/24/2003 Enigmail 0.81.0 for Thunderbird has been released. Major parts of user interface have been redesigned
  
• 7/21/2003 Bugfix release 0.76.3 for Mozilla 1.4/Netscape 7.1
  
• 6/20/2003 Enigmail 0.80.0 for Mozilla Thunderbird released
  
• 
  6/18/2003 Version 0.76.1 for Mozilla 1.4-rc2
  
• 6/8/2003 Version 0.76.0 for Mozilla 1.4-rc1 with enhanced support for encrypting/decrypting attachments
  
• 5/2/2003 Bugfix Version 0.74.3 for Mozilla 1.3
  
• 4/28/2003 New enhanced version 0.75.0 for Mozilla 1.4a
  
• 28/4/2003 First information on Enigmail support for Mozilla Thunderbird (0.1-pre)
  
• 4/4/2003 Version 0.74.1 for Mozilla 1.4a
  
• 3/31/2003 Version 0.74.0 for Mozilla 1.3
  
• 2/17/2003 Version 0.73.1 for Mozilla 1.3b
  
• 2/14/2003 Version 0.73.0 for Mozilla 1.3b
  
• 1/10/2003 Version 0.72.0 for Mozilla 1.3a
  
• 12/20/2002 Version 0.71.3 for Mozilla 1.3a
  
• 10/17/2002 Version 0.70.0 for Mozilla 1.2b
  
• 9/13/2002 Branch version 0.65.4 for Mozilla 1.2a
  
• 8/27/2002 Branch version 0.65.2 for Mozilla 1.1
  
• 7/24/2002 Branch version 0.65.1 for Mozilla 1.1b
  
• 7/12/2002 Version 0.63.1 for Mozilla 1.0 and 1.1a
  
• 5/31/2002 PGP/MIME support added in Version 0.60.0 for Mozilla 1.0 RC3
  
• 5/23/2002 Version 0.49.5 for Mozilla 1.0 RC2 and Netscape7 PR1
  
• 4/27/2002 Version 0.49.3 for Mozilla 1.0 RC1. Linux/PPC and FreeBSD platforms also supported now
  
• 4/12/2002 Version 0.49.1 for Mozilla 1.0 Release Candidate
  
• 3/12/2002 Version 0.39 for Mozilla 0.9.9; RPMs also available
  
• 2/21/2002 Version 0.28 for Mozilla 0.98
  
• 1/21/2002 Improved version that automatically verifies/decrypts
  
• 12/26/2001 A version that works with Mozilla 0.9.7
  
• 12/13/2001 A version that works with Mozilla 0.9.6
  
• 11/5/2001 Incorporating new button icons contributed by Jochen Eisinger!
  
• 10/29/2001 A version that works with Mozilla 0.9.5
  
• 8/3/2001 A version that works with mailnews and Mozilla 0.9.3
  
• 5/15/2001 Finally a version that works with mailnews and Mozilla 0.9
  
• 3/15/2001 Initial source/XPI files created
  

Features List

• Tightly integrated suport for OpenPGP with the Mozilla Thunderbird and Mozilla Seamonkey mail clients
  
• Encrypt/sign mail when sending, decrypt/authenticate received mail
  
• Support for inline-PGP (RFC 4880) and PGP/MIME (RFC 3156)
  
• Per-Identity based encryption and signing defaults
  
• Per-Recipient rules for automated key selection, and enabling/disabling encryption and signing
  
• OpenPGP key management user interface
  
• Automatically encrypt or sign attachments for inline PGP messages
  
• Powerful GUI for easy configuration and OpenPGP key management
  
• Detailed user preferences for advanced configuration
  
• Integrated OpenPGP PhotoID viewer
  
• Supports OpenPGP key retrieval via proxy servers
  
• Integrates with GnuPG, version 1.4.x and 2.0.x
  
• Supports Mozilla's Multiple Identities feature
  
• Available for: Windows / Mac OSX / Linux x86-32 (all in one official release file), and contributed / distribution builds for other operating systems such as Linux, Solaris, *BSD and OS/2)
  
• Many Language Packs, (mostly) included in the official releases, and available separately for localisation of contributed builds.  

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Repositories for Ubuntu 8.04 Hardy Heron

What are Repositories?

There are thousands of programs available to install on Ubuntu. These programs are stored in software archives (repositories) and are available for installation over the Internet. This makes it very easy to install new programs. It is also very secure, because each program you install is thoroughly tested and built specifically for Ubuntu.

The Ubuntu software repository is organised into four "components", on the basis of the level of support Ubuntu can offer them, and whether or not they comply with Ubuntu's Free Software Philosophy. The components are called Main (officially supported software), Restricted (supported software that is not available under a completely free license), UniverseMultiverse (software that is "not free"). You can find more information about the Ubuntu Repositories here.

The Ubuntu Install CDs contain software from the Main and Restricted components. Once your system is made aware of the Internet-based locations for these repositories, many more software programs are made available for installation. Using the software package management tools already installed on your system, you can search for, install and update any piece of software directly over the Internet, without the need for the CD.

Adding Repositories in Ubuntu

This page describes how to manage software repositories in Ubuntu 7.10 (Gutsy Gibbon) and Ubuntu 7.04 (Feisty Fawn). For Kubuntu please see Kubuntu repository management. For earlier versions of Ubuntu this wiki page. please see

The operations described on this page modify the software repositories configuration file located at

• /etc/apt/sources.list

  Software sources can also be managed by making direct modifications to this file using the command line. If you prefer to use the command line instead of a graphical user interface, see Managing Repositories from the Command Line instead.

Adding the Universe and Multiverse Repositories

• Navigate to "System" > "Administration" > "Software Properties". You will have to enter your password here.

• A list of repositories or "Channels" will be shown. Select "Ubuntu 8.04 (source)" from the list (should be the first one), click "Add...", select "non-free (multiverse)" and "community maintained (universe)" by clicking their check boxes. Now click the "add" button.

  

• Click Close to save your changes. A dialog box should appear, asking whether you'd like to update the list of repositories. Click Reload to apply your changes.

Integration with Synaptic Package Manager

• The next time you use the Synaptic package manager, click on the Reload button to make it aware of the new software repositories.

  

• You can also manage software repositories from within Synaptic by selecting "Settings" > "Repositories".

  

Adding Canonical Commercial Repositories

To launch the Synaptic Package Manager hit System -> Administration -> Synaptic Package Manager .

Next you will be prompted for your password to be able to launch Synaptic as super user.

Once that's all done you should now have the Synaptic package manager on your screen. On the menu of this screen you will want to click on Settings -> Repositories

This is were you will be able to add the Canonical commercial repositories. on the left of the screen click on the button Add.

The Add Channel screen will come up. On this screen select the Custom option.

On this screen type the following line and then click on Add Channel.

deb http://archive.canonical.com/ubuntu feisty-commercial main

Now hit Close. From the main Synaptic window, hit Reload. Once this finishes, you will now be able to get packages from the Canonical commercial repositories using the Synaptic Package Manager.

Adding Other Repositories

Note: There are some (but not many) good reasons for which you might want to add non-Ubuntu repositories to your list of software sources. For example, some software cannot be distributed by Ubuntu due to patent and licensing restrictions in some countries (see the RestrictedFormats page for examples). You might want to add repositories that offer such software. Make sure that all repositories you add in this way have been tested and are known to work on Ubuntu systems. Repositories that are not designed to work with your version of Ubuntu can introduce inconsistencies in your system and might force you to re-install.

---

For an explanation of the different parts of the apt line, see the Editing Repositories section below.

Managing Local Repositories

Disable the CD-ROM Repository

If you have installed Ubuntu from one of Ubuntu's CD-ROMs, the CD will be included in the list of repositories used by the package managment tools. When you install a new package, Synaptic will check whether the package is available locally (i.e. on the CD-ROM). Synaptic may then ask for the CD-ROM. This can help reduce the size of downloads and speed up the installation process. If you would like Synaptic to rely solely on the internet repositories for package management, you can disable the CD-ROM entry with a few steps:

• Launch Synaptic and navigate to "Settings" > "Repositories".
  A list of software repositories or "Channels" will be shown.

• Locate the entry for the CD-ROM (it may say something like CD disk with Ubuntu 8.04). Click on the checkbox next to it to disable the CD-ROM as a software source.

• Click the Close button to save the changes you have made.

• You can re-enable the CD-ROM at any time using the checkbox next to its entry.

Removing Repositories

To remove software sources ("Channels") from the list, select the source and click on the Remove button. (If you only want to disable the repository temporarily, uncheck the checkbox next to the source instead.)

Use with caution: At present, you will not be asked to confirm the remove action. This is not a problem with the Ubuntu repositories as you can simply add them again, but you may have to look up a custom repository line if you mistakenly delete it. (It is always a good idea to back up your sources.list)

Editing Repositories

To make changes to a software source, select it in the list and click the Edit button. A dialog box displays the apt line, broken up into its components.

• 

• Type Software sources may contain software in binary or source code format. Select the option that corresponds to the repository.

  The corresponding apt line has deb for binary repositories and deb-src for source code repositories.

• URI Enter a valid Uniform Resource Indicator or URI for the software repository. Here's a list of examples:

  • cdrom

    cdrom:[description_of_cd]/

  • ftp

    ftp://ftp.domain.ext/path/to/repository

  • http

    http://www.domain.ext/path/to/repository

  • smb (works only when the computer is connected to a Samba share)

    smb://path/to/repository

  • nfs (works only if the computer is connected to a NFS share)

    file://path/to/local/directory

• Distribution
  Select the name of the distribution or the name of the distribution version.
  (dapper-seveas in the example above.)

• Components
  Select the repository section to access. Add more sections separated by spaces.
  (The example repository has a freenx section.)

• Comment
  Add a comment to describe the repository for easier reference.

Repositories defined using the Software Preferences panel are available to Update-Manager and will be periodically checked for updates.

Managing Authentication Keys

Authentication keys are usually obtained from the maintainer of the software repository. The maintainer will often place a copy of the authentication key on a public key server such as www.keyserver.net. The key can then be retrieved using the command

• gpg --keyserver [name of keyserver] --recv-keys [keyhash]

• In our example above, you would import the maintainer's authentication key as follows:

  gpg --keyserver subkeys.pgp.net --recv-keys 1135D466

• Then, add the key to Ubuntu's apt trusted keys database with the following command

  gpg --export --armor 1135D466 | sudo apt-key add -

• Note there's a dash at the end of the line

For more on apt and authentication keys, see SecureApt on the Debian Wiki.

See also

• Managing Software Repositories from the Command Line

• Managing Software Repositories in Kubuntu

• Chapter 2 of the Ubuntu Desktop Guide, Adding, Removing and Updating Applications

• An automatic sources.list generator

• The Debian Apt User Manual

• man pages

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