A combination of virus scanner and firewall, which protects against viruses, hackers, spyware and phishing. Blocks spam and monitors wireless networks. Downloading the demo version requires registration.
This tool acts as an SMTP proxy server and filters all your email traffic before it reaches the actual server. Includes adaptive Bayes recognition, an SPF scan, your own honeypot and RBL (Real-time Blackhole List) check. Can be set up as a service under Windows. Its integrated web server also enables you to configure the server and perform logfile diagnostics via a browser.