SenderInspector SenderInspector is a server-based solution for fighting Windows spam. It allows you to track the real sender of emails, thus killing spam on Windows servers at the roots. The essence of the solution is the following. Outgoing mail on the server does not exist by itself. Eventually, any mail message is sent to the recipient via system libraries such as: CDO, JMail, ColdFusion, System.Net.Mail, etc. SenderInspector is an add-on to the system libraries which prevents spammers from sending mails under a wrong name or a non-existent name of the recipient.