If you want to use the current MaxBulk Mailer 8.6.1 from our site you need an activation code. Indeed the App Store version labeled 'MaxBulk Mailer SE' is a version exclusively sold at the App store that is activated thru the iTunes store. It doesn't use a serial nor an activation code. You can get that activation code + one year of free updates here. It is only 14.90 €.