With the added installation of the many freely available extensions and addons, you can bring Thunderbird many steps closer to becoming a viable alternative to the very powerful Microsoft Outlook or any other email client.
In this post, you will find 30 extensions/addons that will help you get more out of Thunderbird.
Download the latest version of Thunderbird here.
Nostalgy adds keyboard shortcuts to change the current folder, to move/copy selected messages into another folder, to add/remove/view tags; the selection of the target folder is made through an auto-completion box where you can type part of the folder name.
Signature Switch is an extension that allows you to select easily from the toolbar, when and which recipients will recieve your email signature, or you can select which signature does get sent (a personal or professional signature, perhaps).
This useful and time saving extension adds a small edit box and a button above or below the email message text in the main Thunderbird message window. If you type some text in the QuickReply box and then click the 'Send Reply' button, a reply is sent to the writer of the currently selected email with the typed text in the body.
You can choose to select Get All (obviously, recieve and send all messages), Send all, Syncro (the buttons functions are only related to news- and IMAP-accounts), or you can choose to Send Later (Thunderbird itself provides this button, only in offline mode, though. Now you can choose to send later in online mode, too).
Forumzilla lets you read news and blog feeds in Thunderbird. It is similar to the feed reader built into Thunderbird, but it lets you download stories into any folder in any POP, IMAP, or local account (configurable per feed).
The Webmail extension integrates web site based email accounts in to Mozllia Thunderbird, this allows Thunderbird to download and to send emails using the web site. Currently it supports Yahoo, Hotmail, MailDotCom, Gmail, Libero, and even AOL.
With Zindus you can easily sync your personal address book with GMail allowing you to manage all of your contacts within Thunderbird. To keep you in sync, the addon, can be set to initiate automatic syncing on a selected periodic basis.
mozPod is a project to that brings iPod syncronization to Mozilla products such as Thunderbird and Sunbird. For all my serching, I could not find an extension that will allow you to sync with you iPhone, there must be an extension out ther, does anyone know of any?
Lightning is an extension that allows you to bring the Mozilla developed calendar Sunbird together with Thunderbird. Why these two applications were not bundled together in the first place is a mystery, they are made for each other.
With ThunderBrowse you can browse almost any website on the internet. Did a friend send you a link? Simply click the link and ThunderBrowse will load the page instantly right within Thunderbird, without the need to open another application.
Display Mail User Agent (DispMUA) adds an image to the right side of the header view which displays the icon of the application with which the selected mail was written. So if the person who sent you a mail used Outlook to send the mail, an Outlook icon will be displayed.
Auto Zip Attachments is a really handy extension that allows you to easily compress (zip) attachments. A new button named "AutoZip" is added to the compose toolbar, and when you press the button, all the attachments will be compressed into a single file. Then the attachments are replaced with the zipped file.
Many people like to organize their mailboxes the way that GMail encourages, which is to leave only the most recent and important emails in their Inbox.
GMailUI is an extension which add concepts inspired by Gmail to Thunderbird, like archiving mail and powerful message searching across all folders.
For those that don't know, User Styles is an extension for Firefox that allows you to easily style any web page in a way that suits you. What most people don't know is that you can also use this extension for Thunderbird as well. For Thunderbird the extension is called Stylish.
Thunderbird, by default, provides a context menu item for each individual folder within an RSS or News account that marks that folder read, it does not provide one at the account level that recursively marks each folder within the account as read.
Enigmail adds OpenPGP message encryption and authentication to your email client. It features automatic encryption, decryption and integrated key management functionality. Enigmail requires GnuPG (www.gnupg.org) for the cryptographic functions.