Step1: Log into your cPanel.
Step2: Click the BoxTrapper link in the Email section
Step3: Click the Manage button next to the address you want to configure.
Step4: Click the Configure Settings link on the BoxTrappper configuration page.
Step5: In the “Email addresses for this account” section enter any addresses that forward to this address. Separate them with a comma.
Step6: Enter your name in the “Your Name” section
Step7: Next enter “The number of days that you wish to keep logs and messages in the queue.” The default setting is 15 days.
Step8: Set the “Minimum Apache SpamAssassin Spam Score required to bypass BoxTrapper.”
Step9: Check the box if you want to “Enable Automatic Whitelisting.”
Step10:Select if you want to “Automatically whitelist the To and From lines from whitelisted senders (whitelist by association).”
Step11: Click the Save button.