Email notification issues are always web server configuration issues. The email is sent by your web server, not Gravity Forms. I would suggest installing and configuring the WP Mail SMTP plugin which will configure your WordPress site to send email using SMTP which is a more reliable method of sending email.
You can find this plugin here:
You will have to check with your web host on the proper SMTP settings which you configure on the Settings page of the WP Mail SMTP plugin.
The WP Mail SMTP plugin also has a "Test Email" feature that lets you send a test email to check to see if your SMTP settings are correct. Once the "Test Email" works, so will your email notifications. The "Test Email" will also show you a status, including errors, so you can find out why the email is failing if it is not being sent.
Posted 7 years ago on Monday June 13, 2011 | Permalink