Internal Site not sending emails out

Hello. We have an internal website were Gravity Forms is working. However email are not going through. Every time when someone fills out a form it states, “WordPress was unable to send the notification email. Could not instantiate mail function.” We are on version 2.8.12 and the website is hosted on Linux server. Any direction on where to go would be nice. Thanks!

Hi Michael,

The error indicates that your hosting server cannot execute the PHP mail() function. To fix this issue, please follow the solution previously provided by Chris. Thank you.