How to install Thunderbird 3 in Ubuntu 10.10/10.04/9.10/9.04/8.10/8.04 Using Ubuntuzilla PPA

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.

You can check what is new in thunderbird 3 from here

Updated with ubuntuzilla PPA

If you are using Ubuntu Jaunty (9.04) or later:

Edit /etc/apt/sources.list file

gksudo gedit /etc/apt/sources.list

Add the following lines

deb http://downloads.sourceforge.net/project/ubuntuzilla/mozilla/apt all main

If you are using Ubuntu Intrepid (8.10) or earlier

Edit /etc/apt/sources.list file

gksudo gedit /etc/apt/sources.list

Add the following lines

deb http://switch.dl.sourceforge.net/project/ubuntuzilla/mozilla/apt all main

Save and exit the file

Add the GPG key

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com C1289A29

Update the source list

sudo apt-get update

Install thunderbird 3 using the following command

sudo apt-get install thunderbird-mozilla-build

Remove thunderbird 3 using the following command

sudo apt-get remove thunderbird-mozilla-build