Thunderbird is an Mozilla created email client software similar to Microsoft Outlook. Thunderbird supports POP and IMAP protocol for offline reading of your email messages. But to start your email in Thunderbird, you need to configure it so that it starts synchronization with your email account and downloads all your emails from you web email inbox. In this article, I will tell you about Thunderbird configuration for Gmail email account. Configuring Thunderbird to work with Gmail is a relatively simple process.