1. Open Mozilla Thunderbird.
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2. Click on the Menu Icon located on right side of the screen and then go to "New Message". A drop box will open.
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3. Now Click on the "Existing Mail Account".
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4. In Mail Setup Account, fill out your name, full email address like "yourname@example.com", and the password of your email account. Then click on "Continue".
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5. It can take a few minutes to configure your email account so be patient. Once it is done, you will need to click on "Done".
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6. If it shows a SSL Security exception, then click on the "Confirm Security Exception" button and the warning will disappear within few minutes.
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Congratulations, Your email is setup up successfully. Now, you can manage your email through Mozilla Thunderbird.