# Thunderbird

Related articles

- Firefox

Mozilla Thunderbird is an open source email, news, and chat client developed by the Mozilla Foundation.

## Installation

Install the thunderbird package, with a language pack if required.

Other versions include:

- Thunderbird Beta — Cutting edge features with relatively-good stability.

  https://www.mozilla.org/thunderbird/channel/ || thunderbird-beta-binAUR

- Thunderbird Earlybird — Experience the newest innovations as they're developed (equivalent to an alpha and Firefox Aurora releases).

  https://www.mozilla.org/thunderbird/channel/ || thunderbird-earlybirdAUR

- Thunderbird Nightly — Experience the newest innovations with nightly releases (for those that want to work with breakages).

  https://ftp.mozilla.org/pub/mozilla.org/thunderbird/nightly/latest-comm-central/ || thunderbird-nightlyAUR

A version overview, both past and future, can be read on the Mozilla wiki.

## Securing

### Considerations

Under some circumstances Thunderbird may send your system's (internal) IP address as reply to HELO/ELHO requesting SMTP servers. If you have concerns, please read this article. You might change this for Firefox, too.

If you want to hide Thunderbird for sending your system's User Agent string, then you can override the default string with an empty one:

1. go to `Edit > Preferences > Advanced > General > Config Editor`.(*)
2. right-click and create new string entry `general.useragent.override` and leave the second dialog entry empty.

While Thunderbird disables email images by default, it enables HTML rendering which may expose IP address and location. Choose `View > Message Body As > Plain Text` to disable this.

JavaScript is disabled for message content but not RSS news feeds. To disable JavaScript for RSS:

1. go to `Edit > Preferences > Advanced > General > Config Editor`.
2. search `javascript.enabled` and double-click the value to false.

## Extensions

### EnigMail - Encryption

EnigMail is an extension that allows writing and receiving email signed and/or encrypted with the OpenPGP standard. It relies on the GnuPG.

Common packages include: thunderbird-enigmailAUR and thunderbird-enigmail-binAUR.

#### Sharing the public key

To distribute the public key one may upload it to a keyserver.

#### Encrypting emails

Encryption does not always work properly with emails containing HTML. It is best to use plain text by choosing Options > Delivery Format > Plain Text Only in the new email window.

Once the email is finished it can be signed through the OpenPGP menu.

#### Decrypting emails

Assuming that the email was encrypted properly, just trying to open it should result in a pop-up asking to type in the keyphrase.

#### Blank draft messages

If after upgrading to gnupg v2.1 your saved draft emails have gone "blank" and show a pink bar displaying:

    Enigmail Error - no matching private/secret key found to decrypt message; click on 'Details' button for more information

or, when you have a "Write" window open you repeatedly see a popup window with:

    The email address or key ID 0xkey_id cannot be matched to a valid, not expired OpenPGP key.
    Please ensure that you have a valid OpenPGP key, and that your account settings point to that key.

and `gpg --list-keys` fails to show some keys that used to be there, see GnuPG invalid packet workaround.

### TorBirdy - Anonymity

TorBirdy is an extension that configures Thunderbird to make connections over the Tor anonymity network.

### FireTray - Tray icon

FireTray is an extension that adds a customizable system tray icon for Thunderbird. It is available in the AUR as thunderbird-firetrayAUR[broken link: archived in aur-mirror].

### Lightning - Calendar

Lightning is a calendar extension that brings Sunbird's functionality to Thunderbird, including CalDAV support.

It is available in the AUR as thunderbird-lightning-binAUR.

In case you are migrating a user profile (with Lightning installed there) from another platform (e.g. Windows), you may have to reinstall the Lightning addon from the mozilla addon page because Lightning is platform-dependent.

### SOGo Connector (CardDAV)

SOGo Connector allows to sync addressbooks via CardDAV.

It is available in the AUR as thunderbird-sogo-connector-binAUR.

### Cardbook (CardDAV)

Cardbook (VCard Addressbook): a new addressbook for Thunderbird based on the CARDDav and VCARD standards.

## Tips and tricks

### Setting the default browser

Note: Since version 24 the `network.protocol-handler.app.*` keys have no effect and will not be able to set the default browser.

Recent versions of Thunderbird use the default browser as defined by the system MIME settings. This is commonly modified by the Gnome Control Center (Gnome Control Center > Details > Default Applications > Web) (available in: gnome-control-center).

This can be overridden in Thunderbird through Edit > Preferences > Advanced > General > Config Editor by searching for `network.protocol-handler.warn-external`.

If the following three are all set to false (default), turn them to true, and Thunderbird will ask you when clicking on links which application to use (remember to also check "Remember my choice for .. links").

    network.protocol-handler.warn-external.ftp
    network.protocol-handler.warn-external.http
    network.protocol-handler.warn-external.https

### Plain Text mode and font uniformity

Plain Text mode lets you view all your emails without HTML rendering and is available in View > Message Body As. This defaults to the Monospace font but the size is still inherited from original system fontconfig settings. The following example will overwrite this with Ubuntu Mono of 10 pixels (available in: ttf-ubuntu-font-family).

Remember to run `fc-cache -fv` to update system font cache. See Font configuration for more information.

    ~/.config/fontconfig/fonts.conf

    <?xml version="1.0"?>
    <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
    <fontconfig>
      <match target="pattern">
        <test qual="any" name="family"><string>monospace</string></test>
        <edit name="family" mode="assign" binding="same"><string>Ubuntu Mono</string></edit>
        <!-- For Thunderbird, lowering default font size to 10 for uniformity -->
        <edit name="pixelsize" mode="assign"><int>10</int></edit>
      </match>
    </fontconfig>

### Webmail with Thunderbird

  See upstream Wiki: Using webmail with your email client.

### Migrate profile to another system

Tip: The ImportExportTools addon offers an option to export and import a profile folder.

Before you start with Importing or Exporting tasks, backup your complete `~/.thunderbird` profile:

    $ cp -R ~/.thunderbird /to/backup/folder/

With migration you just copy your current Thunderbird profile to another PC or a new Thunderbird installation:

1. Install Thunderbird on the target PC

2. Start Thunderbird without doing anything and quit it.

3. Go to your Backup folder of your old Thunderbird installation

4. Enter the backup profile folder:

    $ cd /to/backup/folder/.thunderbird/<oldrandomnumber>.default/

5. Copy its content into the target profile folder `~/.thunderbird/<newrandomnumber>.default/`

    $ cp -R /to/backup/folder/.thunderbird/<oldrandomnumber>.default/* ~/.thunderbird/<newrandomnumber>.default/

### Export + Import

Before you start with Importing or Exporting tasks, backup your complete `~/.thunderbird` profile:

    $ cp -R ~/.thunderbird /to/backup/folder/

If your accounts are broken or you want to join two different Thunderbird installations, you better install one Import and Export AddOn (eg. ImportExportTools AddOn) to both Thunderbird installations and following this just export and import all your data to the new installation.

### Changing the default sorting order

Thunderbird (up to at least 31.4.0-1) sorts mail by date with the oldest on top without any threading. While this can be changed per folder, it is easier to set a sane default instead as described in this Superuser.com post.

Go to Edit -> Preferences -> Advanced -> General -> Config Editor and set these keys:

    mailnews.default_sort_order = 2 (descending)
    mailnews.default_view_flags = 1 (Threaded view)

### Maildir support

The default message store format is mbox. To enable the use of Maildir, see Mozilla wiki: Thunderbird/Maildir. You basically have to set this preference through (Edit -> Preferences -> Advanced -> General -> Config Editor):

    mail.serverDefaultStoreContractID = @mozilla.org/msgstore/maildirstore;1

Some limitations up to at least 31.4.0-1: only the "tmp" and "cur" directories are supported. The "new" directory is completely ignored. The read state of mails are stored in a separate ".msf" file, so initially all local mail using Maildir will be marked as unread even when located in the "cur" directory.

## Troubleshooting

### LDAP Segfault

An LDAP clash (Bugzilla#292127) arises on systems configured to use it to fetch user information. A possible workaround consists of renaming the conflicting bundled LDAP library.

### Error: Incoming server already exists

It seems Thunderbird (v24) still has that bug which pops up with "Incoming server already exists" if you want to reinstall a previously deleted account with the same account data afterwards. Unfortunately, if you get this error you can now only clean reinstall Thunderbird:

1. Make a backup of your current profile:

    $ cp -R ~/.thunderbird /to/backup/folder/

2. Export all you Accounts, Calendar and Feeds via an AddOn like it's written in Export section of this Wiki. 3. Uninstall your current Thunderbird installation

    $ pacman -R thunderbird

4. Remove all your data by deleting your current Thunderbird folder `rm -R ~/.thunderbird/`.

5. Install Thunderbird again:

    $ pacman -S thunderbird

6.Create your mail accounts, feeds and calenders (empty).

7. Install the ImportExportTools AddOn

8. Import all your data.

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