LiteMail is an easy-to-use Mail Server (SMTP/POP3) with mail forwarding, unlimited domains and email addresses, and a catch-all for each domain.
This mail server includes unlimited addresses, unlimited domains, forwarding, relaying, spam protection, a catch-all address and quotas. Integrated DynDNS and No-Ip dynamic DNS clients help make LiteWeb a complete and handy server solution. The administrator is given a precise log of everything that occurs and has the capability to monitor and kill connections.
Features:
Supports Multiple Domains
Mail Forwarding and Relaying
SMTP Authentication
Catch-All Forwarding
Ability to monitor and kill connections
Logging with easy copy to clipboard feature
Auto-Logon and Run on Windows startup
Sits in the system tray when minimized
Blacklist (Ban List)
Integrated DynDNS IP update client
Integrated No-IP IP update client

The license of this software is Free Trial Software, the price is $29.95, you can free download and get a free trial.