Step 1: Click on your profile picture icon in your Gmail app.
Step 2 : Click “Add another account”
Step 3 : Click “Other”
Step 4 : Enter your Email address and click “Manual Setup”
Step 5 : Click on “Personal (IMAP)”
Step 6 : Enter your password and click “Next”
Step 7 : For Incoming Server Settings, Enter your “Username, password and server address” and click “Next”
Setep 8 : For Outgoing Server Settings,Enter your “Username,password and server address”and click “Next”
Step 9 : Select options that you preferred and click “Next”
Step 10 : Enter your “Account Name” and “Your Name” then click “Next”