I Am Getting Too Much Spam Emails
Regarding the Spam emails, we have given the Google captcha option that protects from the robot spams.
You can enable the Google Recaptcha on the forms from Form Builder > Edit Forms > Form Settings > Enabled Re-Captcha from there.
It will help you to stop spam emails from the forms.
About the other spam and junk emails our some of the customers have used “Stop Spammers” plugin which has stopped spam emails you can also try this plugin and can check it.