1. ESET NOD32

... phishing, rootkits and other Internet threats than any program available. It's the ideal antivirus for Windows XP, and also runs smoothly on Windows legacy systems, MS-DOS, file servers, mail servers, ...

2. Open-Xchange

Open-Xchange™ is a collaboration and integration server environment with a continuous right management for modules and objects. The product is based on existing components like a web server, mail server, ...