When you are using any Script or any Plugin to send emails in your hosting You need to add email in "WHITELIST EMAIL" section in your plesk:
1: Open the Plesk panel with the credentials you have received on your registered email id.
2: On right corner of Plesk You will see the option named as "WHITELIST EMAIL".
3: When you click on it you will get the option to add the email id you want to whitelist under General section.
4: Once you done click on OK and wait for maximum 3-4 hours for your mail to get whitelisted.
