Email account setup is needed in order to receive notifications via email (such as system warnings, NetFlow alarms, license messages etc.).
Administrator can set SMTP server, Sender and SMTP password.
To do so, go to 
> Settings > Control Panel > E-Mail.
Include password only if it is required by your SMTP (outgoing) mail server. If not, password should be omitted.
If you have multiple installations of NetVizura it is wise for sender name to correspond to the server's name: NVtest@domain.com or NV-production@domain.com.