1. Log in to your nopCommerce admin with this URL – yourdomain.com/admin
2. Click on Configuration >> Email Accounts.
3. Click on the Add New button if you don't have any previous email setup. 
4. Enter the email account details with your mail domain as per the image you see below – 
5. Click on the Save button.
You can test the setting by sending a test email to your email account from the 'send test email' option by clicking the Send Test Email button.
