Email marketing is increasingly being used as an effective way to promote products and services, mainly offered online. The ability to indicate the time of mailings, the selection of products promoted for the clients, and the ability to generate various types of reports based on the openness of mails or the number of site visits based on mailing are another advantages of mailing. Obviously, the most beneficial tool is the use of the appropriate email design software delivered by Freshmail. Thanks to this solution user can create his own templates for mailing, but also can select the groups of recipients to whom the mailing should be addressed. Email design software also gives the ability to decide when to deliver the email. This is beneficial from the point of view of customers interest in shopping - they make purchases on certain days and at a specific time. Submitting an email with a promotional offer during this period of time increases the likelihood of a purchase.