MDaemon is a full-featured POP3/SMTP server for Win 95/98/Me/NT/2000/XP. It allows multiple users on your Local Area Network (LAN) to enjoy e-mail access through a single connection (such as a single dial-up SLIP or PPP connection to a service provider. Program supports multi-threading/multi-CPU capabilities, mailing lists, remote control, strong passwords, spam-blocker, content filtering, IMAP, and multiple domain support. MDaemon 7.1 added features include SPF (Sender Policy Framework) support, easier spam filter white listing (MDaemon Pro only), vastly reduced spam filter false positives (MDaemon Pro only), Bayesian learning for POP users, address book groups for WorldClient (web-based email client), domain functions added to API, and much more!