Purpose: This paper aims to presente mail marketing definition, advantages and disadvantages of email marketing. Then the author show to create a successful email marketing campaign and conducts an example by using Sendin Blue. Some indicators that should be measured in any email marketing campaign are also given in the article. An in-depth reading of the relevant documents has been applied to understand about email marketing. Tips to create an email marketing campaign are provided; therefore, library staff can follow it to build one campaign in order to market products and services for any library.