Mady MTA Service is a small SMTP server for a small group of users. It's small, stable and fast. It can use in a small LAN or home network and provide mail deliver service for a small group of users. It works in system service mode and can be installed on the server computer. All other user need set the outgoing mail server to the server computer to use the SMTP server. It has features on access control and reject unknown connections. It's security to use MadyMTA in LAN.