Step Wise Manual Radiant mail settings for thunderbird
If you don't have a Radiant mail address. you can create an email id from here then you can Radiant 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, Radiant Email address and Password then press Continue.
Click on the Manual config menu at bottom.
Enter Below Radiant incoming server settings.
In incoming click on the dropdown menu and select POP.
Add server host :mail.radiant.net
Port: 110
select SSL/TLS
Enter Below Radiant outgoing server settings.
In outgoing select SMTP.
Add server host :smtp.radiant.net
Port: 25
select SSL/TLS
Tap on Done. Now you are ready to use your Radiant email account on your Thunderbird.