Open-Xchange Server is by default able to recognize incoming e-mail messages as spam mail. The effectiveness of this recognition depends on the administrator's configuration of the Spam-Assassin. E-mail messages that are recognized as spam will automatically be marked as spam in their header and subject lines. In the Spam tab in the Setup area, you can set how e-mails marked in this way are to be treated. There are three different options, among which you can choose by using the corresponding option fields. The typical solution is the automatic transfer of e-mails recognized as spam into the Spam Mail Folder (INBOX/Spam). Another possibility is the selection of the Nothing option. In this case, the header and the subject line of an incoming message recognized by the server as spam will still be denoted as spam, but will still be taken in by the post inbox folder. The third possibility ensures that incoming e-mail messages that are recognized by the server as spam will automatically be deleted.