The following five add-ons have recently been added to the Mozilla Thunderbird extensions repository at the Mozilla website. Some of them are not yet compatible with the latest beta of Thunderbird 3. The email user needs to force compatibility in this case with the Nightly Tester Tools add-on (or edit the compatibility setting in the xpi file manually).

Extra Folder Columns

Thunderbird 2 users were able to display extra columns in the mail folder sidebar. These columns could display the size of each folder on the local hard drive, the total number of emails contained within and the amount of emails that have not been read yet. Not so with Thunderbird 3 which does not provide these additional columns for the folders at all.

Extra Folder Columns has been designed for Thunderbird 3 to add those three columns again to the web browser. All three data columns will be displayed by default but the user has the option to remove them individually so that only the columns are displayed that are of interest to the Thunderbird user.

download Extra Folder Columns

Show In/Out

Show In/Out has been designed for Thunderbird users who like to move email conversations, that is all incoming and outgoing emails, to one folder to have access to all emails of a conversation directly. Thunderbird by default does not show if an email was an incoming or outgoing email. That’s where Show In/Out steps in. It adds two new columns to the main window of Thunderbird. The first displays an icon showcasing if the email was incoming or outgoing, the second displays the name of the sender or recipient depending if the email was incoming or outgoing.

The developer has designed the add-on to replace the sender and recipient columns in the Thunderbird main window helping users who like to move all incoming and outgoing emails into the same folder.

download Show In/Out

ThunderBirthDay

ThunderBirthday will display the birthdays of email contacts in the Lightning calendar add-on. The extension has two dependencies that need to be installed before it can be installed. It first needs the Lighting calendar add-on for Thunderbird and second the MoreFunctionsForAddressBook add-on which adds the fields “birthday”, “birthmonth” and “birthyear” to the email address book.

Create a new calendar in Lightning by clicking File>New>Calendar… in the menu bar. Then choose “On My Computer” as location and “Birthdays from the Thunderbird addressbook” as type for your calendar. Also specify the address book to use as a source for birthdays. Finally choose a name for the new calendar.

Now open the “Edit Card” dialog of an address book card and set the birthday in the “Other data” tab. Note that these changes don’t take effect in the calendar until it gets reloaded. To do this either restart Thunderbird or right click on a calendar from the list, then choose “Reload Remote Calendars”.

Also note that the events generated by ThunderBirthDay cannot be modified with Lightning for the moment. Maybe future versions of the extension will be bidirectional.

download ThunderBirthDay

Forward

Thunderbird by default forwards email messages as attachments. This can be changed in Tools → Options → Composition → General so that the email messages are forwarded as inline messages instead. There is also an option in the Message menu to select either attachment or inline as the method of forwarding the selected emails in Thunderbird. This add-on simply moves this option to more prominent locations: The Forward button and Message context menus.

download Forward

Border Colors

If you have multiple email accounts configured in Thunderbird you might know that there is a chance that you send an email to a recipient from a wrong account. Border Colors is a very simple add-on for Thunderbird that color codes each account that has been configured in the email client. The colors have to be selected after the installation of the add-on as black is being used as the default color for all email accounts.

After configuration a border in the color that has been chosen during configuration will be shown when writing emails. A switch between accounts in the compose email window will also change the border color accordingly.

download Bordercolors

I hope you enjoyed this article. Please write a comment if you would like to have your say on a specific add-on mentioned in this article or would like to add one of your favorite Thunderbird add-ons so that other users can benefit from it as well.

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The Thunderbird add-on tbNotes adds note taking capabilities to the email software. It’s current version is limited to Thunderbird 3 editions which are currently only available as beta versions (the official download version is still Thunderbird 2.x at the time of writing).

The add-on adds the capabilities to add, edit and remove notes in Thunderbird. The functionality becomes available after right-clicking an email message in Thunderbird. This opens the context menu with options to write, edit or remove notes.

It would be very confusing if there would not be an indicator if a note is available for an email. Users of the note taking add-on can add a new column to the email table layout in Thunderbird that indicates if notes are available.

This column is not available by default and needs to be added to the layout by clicking on the rightmost icon in the header display. It is furthermore possible to display all notes on a separate page in the email client. Filters are available on the page to reduce the amount of notes that are shown there. The page can be accessed at Tools > Notes.

The developer has lots of plans to extend the functionality of the add-on. Planned are a sidebar with notes categories or a special folder containing all the notes, adding notes to Thunderbird search and Lighting support so that notes can get automatically synced with the calendar add-on.

The tbNotes add-on can be downloaded from the Mozilla Thunderbird website. Keep in mind that it only works with Thunderbird 3.x clients.

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The process is very simply. The Thunderbird add-on will automatically display an option to unsubscribe from support mailing lists in the header of the emails that are send to the accounts that are managed in the desktop email client.

The Thunderbird user needs to click on the unsubscribe link in the header to initiate the process of unsubscribing from the mailing lists. This will display a prompt informing the user that the add-on will open a new email message which, when send by the user, will unsubscribe the email address from the mailing list.

The email usually consists of an email address of the service that send the mailing list email and subject unsubscribe in the email subject with no body text at all. The unsubscribe link is only displayed for mailing lists that use the Inxmail email marketing service which is used by global brands such as Coca Cola. The add-on is compatible with Thunderbird 2 and Thunderbird 3 up to beta 3 which excludes the latest release of Thunderbird 3 beta. The add-on can however be forced to be compatible with the Nightly Tester Tools. A download is available at the Thunderbird website over at Mozilla.

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Mail Merge is an experimental Thunderbird add-on that increases the email client’s mass mailing capabilities. It does so by introducing two new options to the email software: Mass Mail and Personal Mail.

Mass Mail

Mass Mail is ingenious. The user writing the email starts by writing one email that should be send out to all recipients. This includes the title, body and possible attachments. Then all recipients are added to that email in the appropriate fields. A click on the Mass Mail button (available under File > Mass Mail) will now create individual emails for each email recipient and put them in the outbox of the email client. Each recipient will therefor get an individual email message so that no other email addresses appear in the mail header.

Personal Mail

One problem of the Mass Mail approach is that the emails cannot address the individual. Adding Hej Frank to a mass mail would send that greeting to all other recipients as well. That’s where Personal Mail comes into play. Personal Mail makes use of variables and csv files to address individuals in mass mailings. Variables can be added to any field in the email in the form {{Variable}}. It is for instance possible to write an email like the following:

To: {{Mail}}
Subject: {{ID}}: Notification
Body: Hi {{Name}}, this email …

The selection of File > Personal Mail after writing the email will open a dialog with the mandatory option to load a csv file containing the information. The developer does not describe how the csv should look like and I was not able to figure it out on my own. Users who would like to make use of that feature might want to contact the developer directly. The email address is published at the Mozilla Thunderbird page of the add-on. Mail Merge is compatible with both Thunderbird 2 and 3 and can be downloaded from the official Mozilla website.

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Email identities can be created in the account settings of the Thunderbird email client. The account settings can be reached from the top Tools menu. The user then needs to select one of the configured email accounts. A button Manage Identities should appear in the menu that is also displaying various information about the selected email account.

In there it is possible to add or edit email identities. It is for example possible to select a different SMTP server, signature or vcard, change mail folders, use a digital signature and specify a different email address. The email address can be the same but it does not have to be. It is even possible to add a completely unrelated email address for that new identity. You could theoretically configure the identity to send email that looks like its coming from any email account in the world (enter test@example.com for instance and send the mail to one of your accounts to see how it works).

When you write a new message, Thunderbird uses the default identity for the account you are working in. When you reply to a message, Thunderbird uses the identity that matches the address the message was originally sent to, if it can find a match in the account you are working in.

You can select any identity from any of your accounts when replying, forwarding or composing a new message by selecting it in the From drop down list box. If desired, you can also create a unique signature, specify the draft folder, what folder your copy of the sent message should be stored in, and what reply-to address should be used for each identity.

Additional information about email identities in Thunderbird are available a the Mozillazine website.

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The string sorting option can be very interesting for users of webmail accounts that support Unicode characters like Gmail. The default sorting order in Thunderbird would change the sort order of the Gmail folder as Thunderbird does not use these characters in the sorting process.

The manual folder sorting on the other hand gives the user the versatile option to sort the folders exactly how they should look like without having to care about a specific sort order. It could take longer to sort but in the end it should be the most comfortable for the user.

Manually Sort Folders is available for Thunderbird 3 only. It can be downloaded at the Mozilla Thunderbird website.

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The only available option to customize the archive is the advanced config editor which makes it possible to change the archiving granularity, names and other settings. The Thunderbird 3 add-on Message Archive Options is basically a frontend for the advanced config options.

There are two options that the add-on offers. The first allows the Thunderbird user to customize the granularity of the archiving function in Thunderbird. It is first and foremost possible to switch from the one folder per year structure to either to a single folder structure or one with months as the additional levels. The date format for the year and year – month structure can be altered as well.

The second option is to add a key modifier to the archiving shortcut. It is possible to add Alt, Shift or Control to [a] to archive the selected email messages.

Message Archive Options does not invent the wheel anew but it offers easier access to customizing the email archive in Thunderbird 3. The add-on is only compatible with Thunderbird 3 and available at the Mozilla website.

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The installation is slightly more complicated than the usual add-on installation. The reason for this is Language Tool needs to run as a local server. There is an option to use a remote server but this would mean that the email contents would be transferred back and forth to that server which obviously raises privacy concerns.

The developer of the grammar checking add-on for Thunderbird has published explanations on how to setup the local server and configure the add-on in Thunderbird to use that server. In short: All it takes is to run the server from the web start option provided at the Language Tool website. This will download the files to the local computer system and provide an option to start the tool as a server (File->Option and select “Run as server”:) The server settings need to be changed in the extension’s preferences.

Grammar Checker is an experimental add-on that can be downloaded from the Mozilla website.

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The situation will likely change with the final release of the email client. It is on the other hand likely that most Thunderbird add-ons will function correctly if their compatibility is edited manually or by using an add-on like the Nightly Tester Tools.

Buttons [link]

The Buttons add-on adds several new buttons to Thunderbird 3 including buttons to display the next or previous email (as opposed to displaying the next or previous unread email which is the default option in Thunderbird), SMTP server selection, delete junk button that marks the message as junk and deletes it afterwards, HTML and Image on and off buttons or a delete thread button that deletes the entire thread of messages.

Hide Menubar [link]

The Thunderbird 3 menu does not usually need to be displayed all of the time. Especially users with lower screen resolutions might be interested to save screen estate to work more comfortable in the email client. Hide Menubar is a straightforward Thunderbird 3 add-on that hides the Thunderbird 3 menubar automatically. The alt key can be used to switch between hiding and displaying the menubar.

gContactSync [link]

This add-on makes it possible to synchronize contacts between the Thunderbird email client and one or multiple Gmail and Google accounts.

Smooth Wheel [link]

Smooth Wheel offers the ability to fine tune the mouse scrolling smoothness in Thunderbird. The default smoothness does not satisfy many Thunderbird users (and actually Firefox users as well) and this is the add-on to customize the smoothness for a better experience.

Remove Duplicate Messages [link]

Duplicate emails are usually experienced during connection errors or if the mail program or mailboxes got damaged. This add-on cleans duplicate emails easily offering to move or delete them in the email program.

FiltaQuilla [link]

FiltaQuilla adds new filters to Thunderbird extending the automatic email processing options in the email client. It is for example possible to launch or run a file, append to subject, train the email program as good or junk and mark the email as unread or replied.

Foxclocks [link]

Can display multiple clocks in the Thunderbird interface.

Know of any other Thunderbird 3 add-ons that should be in this list? Let us know in the comments.

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Most Thunderbird users probably do not need some of the information and options provided by default. This includes for example the information to whom the email was send or the action buttons like deleting emails which are also available on a right-click in the email itself.

That’s where the experimental add-on Compact Headers comes into play. The add-on is compatible with Thunderbird 3 only and can reduce the size of the email header to one row.

Thunderbird 3 Default Email Header:

Thunderbird 3 Compact Email Header:

The way the email header is displayed in compact form can be altered in the add-on’s options. It is possible to increase the size to two rows which can also hold some of the buttons that are provided in the standard Thunderbird header. Buttons can be individually selected in the options.

Compact Header for Mozilla Thunderbird 3 is an experimental add-on that is not automatically updating itself. The add-on comes with a “check for updates” button in the options. It is available at the Mozilla Thunderbird add-on repository at Mozilla.org.

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The release notes contain a huge list of new features and improvements including a new email search with advanced filtering options, global search with autocomplete, smart folders, tabbed email messages, new add-ons manager, improved address book, better Gmail integration and integration into Windows Vista’s search results.

Improvements have been made to overall performance and stability as well as web compatibility and sustainability. The way IMAP connections are handled has been improved in this version of Thunderbird as well. Thunderbird can now download IMAP messages by default in the background “to allow for faster message loading and better offline operation”.

Users who are interested in the new version can download it from the Mozilla Thunderbird website. The usual precautions should be taken considering that this version is still a beta version that should not be used in a production environment. The full release notes can be accessed at this link.

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Fox Clock will add clocks to the Thunderbird status bar. Those clocks – unlike in Firefox – will be displayed next to each other in the desktop email program. This is more comfortable as all clocks are visible all the time opposed to the one clock that is visible in Firefox.

The add-on comes with additional options to configure the time format, position and style, time zone data and more. That’s another positive aspect of the add-on when compared to its Firefox counterpart. The clocks can be displayed on the left or right side of the Thunderbird status bar. An alternative is the option to display them as a toolbar instead which could then be placed in the Thunderbird header area.

Fox Clocks in an helpful add-on for email users who regularly correspond with email users from other places in the world. The Thunderbird add-on is compatible with all versions of Thunderbird. It can be downloaded from the official Mozilla Thunderbird website.

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Thunderbird Quick Folders aids email users who work with multiple folders in their email client. The add-on will add a new toolbar to the Thunderbird header that can be used to drag and drop folders into it. These folders act as quick access points to the bookmarked folders. It is possible to access these email folders either by left-clicking on them or pressing the keyboard shortcut Alt 1-9 to go there.

The add-on for the email client is highly flexible and offers extended settings to change functionality and design of the add-on.

Options include changing the colors of the email bookmark tabs, displaying the mail count next to each email folder or to automatically focus on the message list when switching to another bookmarks tab. Quick Folders is available at the official Mozilla Thunderbird website. The add-on for the email client is compatible with all versions of the Thunderbird.

Thunderbird users who like to bookmark individual emails might want to take a look at the Bookmark Emails add-on which we reviewed a while ago at Ghacks.

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A third option is provided by the Thunderbird add-on eMarks which supposedly stands for email bookmarks. The add-on adds a new toolbar to the email client. Emails can then be dragged and dropped into that toolbar easily. This makes these emails available from every folder the user might be in. These emails are then accessible with a left-click of the mouse. Thunderbird will automatically switch to the folder the email is stored in and display it in the preview pane.

A right-click on any bookmarked email will open a context menu with options to open the email in a new window or tab and to rename or delete it. Users who prefer no additional toolbar in the email client can disable it and access the bookmarked emails from the file menu at the top. An emarks entry is added by the extension that can be used to access the bookmarked emails with three clicks of the mouse. Not as comfortable as the toolbar solution but better if space is an issue.

The eMarks extension for the Mozilla Thunderbird email client is available at the Mozilla Thunderbird website. It is compatible with all the latest versions of the desktop email client (including Thunderbird 3 beta).

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The portable software program will unpack a Firefox setup file to the local computer system. The user then needs to add extensions, bookmarks, plugins and preferences to the paths the installation has been extracted to and pack everything in the end to create a new custom Firefox installation.

It is possible to create a custom Firefox or Thunderbird installation with the software program.

A Firefox or Thunderbird setup file needs to be specified in the next step. These files can be downloaded from the Mozilla website.

Firefox add-ons have to be downloaded and placed into the relevant project directory so that they are installed whenever the custom Firefox version is installed on a computer system.

A click on copy my files and then pack will create the custom Firefox or Thunderbird installation file. This file contains all plugins, extensions, bookmarks and search plugins which will be installed during the custom Firefox setup.

You can download the program to create custom Firefox and Thunderbird setups from the MSFN forum.

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If you open Mozilla Thunderbird in the classic view you are looking at a window that is divided into two areas. The left sidebar contains the email folders while the right window the emails that are contained in the folders and the contents of the selected email.

Thunderbird displays the same icon in the header of the folder and email area to change email display options. The display options can be accessed by left-clicking on the icon which will reveal several display options that can be enabled or disabled with another left-click.

The folder pane offers the three additional display options unread, total and size. Unread will display the unread count of folders, total the total amount of emails in a folder and size the size of that folder on the computer’s hard drive. These options offer several new ways of working with Thunderbird. It is for example possible to see the largest folders or the folders with the highest unread email count on a glance.

The very same display option menu is available in the email list in the right pane. This one contains additional display options that will display the information in additional columns in the same window. This includes sizes, email accounts, recipients, tags and about a dozen more.

These options can again be used to display additional information providing options to display and sort emails by size, recipients or email accounts. The two email display options described in the paragraphs before can for example be used to discover and delete the biggest attachments or emails of a webmail account like Gmail, Yahoo Mail or Live Mail.

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The Auto Resize JPEG extension for the Mozilla Thunderbird email client offers another possibility. The extension will automatically resize pictures that are attached in the email client before they are send out by the user.

The Thunderbird extension will automatically recognize jpg image attachments and display a prompt after clicking on the send button. It is possible to optimize the images or skip the optimization. The options of the add-on contain settings to always optimize images in the email client (which will remove the prompt after clicking on the send button) and to specify a minimum height and width. The default values are set to 1024 pixels each. Options to change the quality level would be nice.

The extension for the Thunderbird email client can be very handy for users who regularly send image attachments in their email messages. It can save them time and bandwidth (and probably a few emails from angry recipients who received large emails). Auto Resize JPEG is available from the Mozilla Thunderbird website. It is currently only available for the Windows operating system.

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The email client should pick up the update upon its next startup automatically. Thunderbird users can alternatively use the Help > Check For Updates function in the email client or visit the Mozilla Thunderbird website to obtain the update. The vulnerability, which was disclosed on August 1 is not only affecting the email client but also other Mozilla applications included Mozilla Firefox 3.5 or Firefox 3.0.13.

IOActive security researcher Dan Kaminsky reported a mismatch in the treatment of domain names in SSL certificates between SSL clients and the Certificate Authorities (CA) which issue server certificates. In particular, if a malicious person requested a certificate for a host name with an invalid null character in it most CAs would issue the certificate if the requester owned the domain specified after the null, while most SSL clients (browsers) ignored that part of the name and used the unvalidated part in front of the null. This made it possible for attackers to obtain certificates that would function for any site they wished to target. These certificates could be used to intercept and potentially alter encrypted communication between the client and a server such as sensitive bank account transactions.

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Thunderbird by default does not link email conversations in any way. This means that it can sometimes be difficulty to locate all emails of a conversation in the web browser. This is especially true since those emails are usually located in at least two different folders (Sent folder and Email Inbox).

The concept that ThreadVis introduces can be explained with a few words. It processes emails from selected folders (or all emails if the user selects that option) and creates links between emails if they are part of the same conversation.

It then visualizes this conversation in the email header which makes it easy to jump to all emails that are part of it. The emails are color coded in the header. Green dots visualize emails that have been received by the user while red emails are those that have been sent. The time it took for each reply is also shown in the visualisation.

The Thunderbird extension will display a configuration dialog after installation which can be used to define the folders that should be processed and cached by it. It is important to process all relevant folders (e.g. inbox and sent). Some emails are otherwise shown as missing in the visualization.

The visualization can also be displayed in its own separate window which might be useful for some users. ThreadVis is a great Thunderbird add-on for users who want to have better control over email conversations in the email client.

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It is therefor usually not a good idea to download and install an old version. It might be different during beta testing but it is generally recommended to figure out other ways of coping with a problem.

There is however a very easy way of downloading old versions of either Thunderbird or Firefox. Just point your web browser to ftp.mozilla.org and visit the ftp repositories for either program. The ftp server not only lists the latest version but also all other releases that have been created in the past. Here are the direct links:

• ftp://ftp.mozilla.org/pub/thunderbird/releases/
• ftp://ftp.mozilla.org/pub/firefox/releases/

Again: It can be highly problematic to install old releases. Make sure you backup the data before installing an older version of Thunderbird or Firefox.

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