The cPanel BoxTrapper allows you to activate e-mail verification for those not on your white list. This means that any mail address that is not placed on your white list will be required to send back a verification mail to ensure that they are not a spammer. This function can be quite useful in preventing automatic mailings that you do not wish to receive from reaching your inbox.

Steps

1 To access the Mail Menu, click on the icon above the word Mail on the main screen of your cPanel interface.

2 Click on BoxTrapper Spam Trap.

3 To enter the BoxTrapper menu, click on the word Manage.

4 Click on the button labelled Enable to enable the BoxTrapper.

cpanel>>boxtrapper>>manage>>review queue>>click any mail>>select action wanted
Back end file
/home/cpaneluser/etc/domain/mailuser/.boxtrapper