Open Mozilla Thunderbird.
Select “Email” under the “Create a new account” section.
3. Click “Skip this and use my existing email”.
4. Enter your name in the field provided. This will appear in the “From” section when sending email.
5. In the “Email address” field, enter your full email address in all lowercase letters. For example: email@example.com. In the password field, enter the email account's password. Check “Remember Password” to skip entering your password each time you connect to your email account.
7.Select IMAP as the type of incoming server if you plan to sync email between your devices. POP3 should be used if you would like to download all emails from the email server to your computer and not have access to them using WebMail, your mobile device, tablet or outside of ThunderBird.
12. Click the “Re-test” button to check whether you are able to successfully connect and create your account.