To set up Thunderbird for the first time, launch the Thunderbird program. You will be presented with the New Account Setup Wizard shown below. Place the dot next to Email Account and click Next.

In the Your Name field, type in your real name, or the name you want others to see when receiving an email from you. This can be anything you’d like. In the Email Address field, type in your full email address, including your user-name and full realms, as shown in the example below. Click Next when everything is typed in.

Make sure the dot is next to POP. In the Incoming Server field, you will type in the appropriate server name, which can be found here. For the Outgoing Server field, type in authmail.core.com and then click Next.

For the Incoming User Name field, type in the first part of your email address. For example, if your email address was john.doe@voyager.net, you would type in john.doe with no spaces before or after the name. For the Outgoing User Name field, type in your full email address, in this example it would be john.doe@voyager.net. Click Next.

For the Account Name, type in your full email address and click Next.

Checkmark the Download Messages Now box and then click Finish.

Enter your password in the Password field and checkmark the small box below it if you would like to have Thunderbird remember your password. Click OK to complete the setup.