Mozilla Thunderbird is now the default email client for Ubuntu 11.10 Oneric Ocelot. This has increased its importance for Ubuntu users. Recently Mozilla Thunderbird 5 has been released with new features and a PPA for Ubuntu 10.04, 10.10 and 11.04 users. You can install Mozilla Thunderbird 5 from the below Terminal commands.
sudo add-apt-repository ppa:mozillateam/thunderbird-next sudo apt-get update sudo apt-get upgrade
Among the many enhancements, Thunderbird 5 has a more robust Add-ons manager. Now you can get exclusive information about upcoming and suggested add-ons and check out Mozilla Thunderbird themes and personas for customization it.
Thunderbird has also made tab management easier by allowing drag and drop of tabs to separate windows.
Thunderbird now has a more advanced troubleshooting mechanism and information page to help users diagnose problems. You can get information about added accounts, add-ons, modified preferences and send an email to Mozilla administration for queries and support.
Other new features include a better account creation wizard, size information for new attachments and plugins are loaded in RSS Feeds by default.