This tutorial shows you how to configure Thunderbird in order to send and receive mails of Gmail account .
Step 1 : Log on your Gmail account and Go to Options(Gear icon) which is at top & Click Mail Settings .
Step 2: Go to Forwarding and POP/IMAP option and change the options as below .
Step3: Next step is to configure Thunderbird which is the default mail client in Ubuntu 11.10 . Go to Mail -> Setup mail .
Step4: Enter your required Gmail Login Credentials in Mail Setup .
Step5: That’s it done !! If you face any issues , Please let us know .
Couldn’t have said it better myself.