With THUNDERBIRD Mail, all THUNDERBIRD Customer Support phone number have to do is follow simple steps to access your account. You have to log into your account by typing in your username. Choose THUNDERBIRD.net Support phone number the Customer menu and enter your password. Sign-in and you can manage your phone number account as you normally do in your computer at home. You can Support your outgoing mail, read THUNDERBIRD mail and even download attachments. When you’re done, don’t forget to ...