Many marketers are wondering why email marketing is king. Fast emailing targeted to a select group of customers is able to increase sales potential and increase customer"s engagement and brand loyalty. While creating mailing and mailing templateslmdifferent aspects are important. In order to streamline the mailing process addressed to customers, it is worth using software provided by Freshmail. The modern tool for creating templates and sending mailings is also based on the efficient use of customer databases, so users do not have to look beyond the question why email marketing is king. The personalization of mailing, the delivery of content that will be interesting to the customer and the promotion of products chosen for the custoem are the undoubted strengths of this solution.