Storytelling in marketing is a popular method to increase customer engagement. The idea behind such activities is to create content that engages the customer and therefore uses links to digital media, but also content that will be valuable from customer"s point of view. Software created by Freshmail allows to use storytelling in marketing in a way that the customer would like to open personalized emails sent by the indicated online store or brand. The ability to practice customer interest is the basis for well-planned marketing communications. Each email, sent with usage of the Freshmail solution, should be targeted to the precised group. Equally important is the time at which mails are sent to customers. Time factor has a big impact on opening e-mails and familization with its content.