Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.
Under the Help Menu, you can find the new Migration Assistant to help you set up Thunderbird the way you want it. If you liked the old toolbar from Thunderbird 2, you can quickly make that change with the Migration Assistant. You can also install add-ons from the Migration Assistant like Advanced Folder Columns and Compact Header for your message display window.
Mail Account Setup Wizard
Prior to this new feature you had to know your IMAP, SMTP, SSL/TLS settings. Now all you need to provide is your name, email address, and password and the new email account set up wizard will check our database and find the email settings for you.
One-click Address Book
One-click Address Book is a quick and easy way to add people to your address book. Add people by simply clicking on the star icon in the message you receive. Two clicks and you can add more details like a photo, birthday, and other contact information.
The new attachment reminder looks for the word attachment (and other words like file types) in the body of your message and reminds you to add an attachment before hitting send.
The Activity Manager records all the interactions between Thunderbird and your email provider in one place. There’s no more guess work. You only have to look in one place to see everything that’s happening with your email.