The user experience of e-commerce customers enhance greatly if they have quick access to information related to their purchases. The interesting information could be in the form of invoices, shipping updates and many others. For idealo (https://www.idealo.de/), the source of this information is a large volume of merchant emails. In order to extract relevant information, it is necessary to classify the incoming emails automatically into the respective categories. Therefore, with the help of machine learning, an email classification model was developed and eventually integrated into production. Several technologies were utilised in this pursuit.