Introduction This chapter explains how to set up content checking in Mail essentials. The content checking feature allows you to set-up a policy regarding what types of email you will allow to leave and enter your company/mail server. To set up such a policy, Mail essentials uses the concept of 'Rules'. A rule is a condition that you set, for example, blocking all executable attachments into your company. Other examples of rules are: blocking all mails which contain certain words blocking all mails with attachments that can contain programs or scripts. (*.vbs) (Love Letter!) blocking mails which are larger than a certain size. blocking certain users sending attachments all together. More: Types of Content checking rules