In using Chronoforms version 5 on Joomla version 3.6 you encounter an issue where all emails and forms are being sent as Root User localhost, you may need to check on the following:
Joomla global configuration server e-mail settings
- Go to mail settings under Global Configuration > Server > Mail Settings
- Check that the email field has a valid system email address entered, one that will serve as your website system email for all notifications, alerts and mails.
- Enter also a proper sender name, ex: your company or website name
- Click on Send Test Mail
- Ensure you are receiving this test mail before proceeding to Chronoform troubleshooting. If not received, normally your webhosting provider or developer can assist you with fixing this.