[email protected] is the data that must be added to the dictionary to accomplish this goal. A content dictionary is a list of values that can be used as a condition in a content filter or a message filter. Forged Email Detection is a feature that allows Cisco ESA to detect and prevent email spoofing attacks, where the sender's address or domain is forged to appear as someone else, such as the CEO of the organization.
To create a content dictionary for use with Forged Email Detection on Cisco ESA, the administrator can follow these steps:
Select Mail Policies > Content Dictionaries and click Add Dictionary.
Enter a name and description for the content dictionary, such as CEO Email.
Under Dictionary Values, click Add Value.
Enter the email address of the CEO, such as [email protected].
Click Submit.