Open Eudora Email, Click Tools Tab > Options Tab

Choose Getting Started option and Fill in the information below :

Real Name: your name (Ex. : Gittoe Piero)
Return Address: user-name@rad.net.id (Ex. : gopiero@rad.net.id )
Mail Server (Incoming): pop.rad.net.id
Login Name: user-name ( Ex. : gopiero )

Choose Checking Mail option and Fill in the information below :

Mail Server: pop.rad.net.id
Login Name: user-name ( Ex. : gopiero )
Click OK

Choose Sending Mail option and fill in the information below :

SMTP server: smtp.rad.net.id
Click OK