IIJ Secure MX Service is an ASP service that operates through an IIJ gateway server established between a customer’s mail system and the Internet to offer comprehensive mail security functions. IIJ support engineers provide 24-hour, 365-day monitoring of redundant gateway servers located at the data center. The service allows customers to implement the latest mail security measures without diverting manpower or assuming hardware risks that are incurred when companies develop in-house systems. This enables stronger internal control and a reduction of total costs, without modification to a company’s existing mail system.”]
Source: https://www.darkreading.com/attacks-breaches/iij-offers-email