"New features
"The first thing that you will see when running a fresh install of Thunderbird 3.0 is the prompt to set up your email accounts.
"Adding your Hotmail or Gmail account is very easy. You just need to enter your username and password and it will do the rest of the configuration. You don’t need to know any IMAP, SMTP, TLS settings, the wizard will check a database and find the right settings for your account. It also supports IMAP by default, so you can sync your online account with Thunderbird easily.
Tabbed content
"Thunderbird 3 comes with tab support so you can open your emails in tabs. Search results are automatically opened in new tabs so you can return to your mailbox easily."