Mozilla Thunderbird is a total redesign of the Mozilla mail component to produce a cross-platform, stand-alone mail application using the XUL user interface language. It has many new features, among them the ability to customize your toolbars the way you want them. a new look and feel with a large number of downloadable themes which alter the appearance of the client, and the ability to add UI extensions.

Whatís New in Thunderbird

The latest version of Thunderbird has the following changes:

More responsive and faster to start up and use
Thunderbird is based on the new Mozilla Gecko 5 engine
New Add-ons Manager
Revised account creation wizard to improve email setup
New Troubleshooting Information page
Tabs can now be reordered and dragged to different windows
Attachment sizes now displayed along with attachments
Plugins can now be loaded in RSS feeds by default
There are several theme fixes for Windows Vista and Windows 7
Support for Mac 32/64 bit Universal builds (Thunderbird no longer supports PowerPC on Mac)
Over 390 platform fixes that improve speed, performance, stability and security

Install Thunderbird 5 on ubuntu using PPA

Open the terminal and run the following commands

sudo add-apt-repository ppa:mozillateam/thunderbird-stable
sudo apt-get update
sudo apt-get install thunderbird

Install lightning extension for your thunderbird email client

Lightning brings the Sunbird calendar to the popular email client, Mozilla Thunderbird. Since itís an extension, Lightning is tightly integrated with Thunderbird, allowing it to easily perform email-related calendaring tasks.

Open the terminal and run the following command

sudo apt-get install lightning-extension