Step Wise Manual Duo-county mail settings for thunderbird
If you don't have a Duo-county mail address. you can create an email id from here then you can Duo-county email login.
Open Thunderbird Software App. Click on Email
When you click on the email, pop-up Set UP an Existing Account Screen.
Enter Your name, Duo-county Email address and Password then press Continue.
Click on the Manual config menu at bottom.
Enter Below Duo-county incoming server settings.
In incoming click on the dropdown menu and select POP.
Add server host :mail.duo-county.com
Port: 110
select SSL/TLS
Enter Below Duo-county outgoing server settings.
In outgoing select SMTP.
Add server host :smtp.duo-county.com
Port: 25
select SSL/TLS
Tap on Done. Now you are ready to use your Duo-county email account on your Thunderbird.