Login to your Cpanel
Scroll down to the email tab.
Click on Spam Filters.
Scroll down to the Additional Configurations tab and click Show Additional Configurations at the bottom
Scroll down to the Whitelist (Emails Always Allowed) tab and click Edit Spam Blacklist Settings at the bottom
Click on Add A New “blacklist_from” Item
Enter the email you need to be whitelisted into the box then click on the update blacklist (blacklist_form) button
