Teh main window of Email Security will allow you to easily access all the main features of the application. 

The logging module of Email Security allows you to configure the log level and file path and here you can also read the last 1000 lines of the log file. 

The authentication window of Email Security will enablwe you to choose the way in which the users will be authenticated. 

In the security module you can configure the anti distributed denial of service attack features. 

If you want to further secure the SMTP server, you can use IP filtering of incoming connection's IP address. 

The real time blacklist server is a specially maintained and frequently changed IP that you consider to be malicious or that can send massive spam. 

In this window of Email Security you can further cusatomize the SMTP options regarding ports, connections and more. 

All the emails in the maililng system necessarily belong to a domain and here is where you can manage all of them.