Free 30-Day Trial. We believe you should always have an option to test the waters before diving into any major endeavor. During your free trial, you will have complete access to the Ironport service. Your entire organization will immediately be protected by the robust power of the global Ironport servers. Coupled with the Senderbase global network and the Ironport Threat Operations Center, Ironport is by far the most robust, powerful, and trusted anti-spam service in the world.
How it Works. It all starts with a reputation. Every mail server in the world has a reputation score based on the type of email that originates from that server. If a particular server is known for sending out too much spam, it gets a lower reputation. If it only sends out “good email” then it has a high reputation score. Even if the email comes from a “good server” it is also scanned for content, attachments, formatting, and thousands of heuristical elements that contribute to the overall spam score for that particular email. The global network of Ironport servers works together in unison to provide a mighty firewall of defense that is uniquely tailored to your personal inbox.