System Requirements for ITA Secure Messaging Appliance Appliance comes pre-configured from our labs and does not require any software installation on your end. All you have to do is to turn it on, configure your firewall or DNS server to route traffic for port 25 through the appliance and that is it. ITA Secure Messaging Corporate/Enterprise Edition Hardware Requirements Important: ITA Secure Messaging edition can run either on the same machine as your corporate emails server or a different machine, which is the recommended configuration. Windows 2000, XP, or 2003, Linux, Solaris, AIX, HP-UX 256 MB Ram - 512 recommended 1 GHz CPU or higher 50 MB for ITA Secure Messaging. Additional hard disk will be required for email storage, which depends on the volume of emails received by your Email Server. This number can potentially grow to giga bytes. Email Server This version of ITA Secure Messaging supports any SMTP compliant email servers. Following a partial list of supported email servers Sendmail Sun ONE messaging server Microsoft Exchange 5.5, 2000, and 2003 Lotus Notes/Domino GroupWise Apache James Any other SMTP complaint mail server