Productive Corporation

As a hosted antispam service, Hosted Email Security does not require additional hardware or software located on your premises since all scanning hardware and software is operated and maintained offsite at Trend Micro’s secure network operating centers.

Accessing local Hosted Email Security administration requirements:  

To start using Hosted Email Security, environments must also have an existing Internet gateway or workgroup SMTP connection and access to the DNS mail exchange record required to redirect the MX mail host record. If you have hosted email, then contact your service provider for more information or configuration help in redirecting your MX record.