This is a secure mail server with antivirus and antispam, a built-in firewall with NAT and proxy for controlled Internet sharing. The standards-based SSL SMTP/POP3 e-mail server provide secure encrypted communication. DNSBL support, Bayesian filter and blacklist / whitelist management provide complete junk mail protection. An integrated fax server provides unified access to faxes and e-mail. Secure your network with the built-in packet filter, and use the HTTP & SOCKS proxy with cache for monitored Internet sharing. Manage IP addresses with the included DHCP server. The integrated Web server provides access to the Web mail client, shared address book, remote administration and user home pages. SSL, ISAPI, CGI, and FastCGI support is available.