Your not using cPanel/WHM correctly. Login to WHM Select Module Install Select PHP pecl Then search for mailparse Install   I highly recommend you use CloudLinux with cPanel/WHM or even cPanel's MulitPHP Manager.  https://documentation.cpanel.net/display/ALD/MultiPHP+Manager+for+WHM Either solution allows you have cPanel accounts use different version of PHP. This is great for legacy applications that require specific versions of PHP or spe