From Majodio Software:
Majodio Mail is an enterprise quality SMTP/POP3 server which has the following features: Email verification of SMTP from command to ensure that whoever is sending the email is legitimate API support for .Net 2.0 Plug-in manager to allow for additional functionality if desired. Configurable encrypted email storage for security Support for MIME 1.0 parsing. Multi-threaded SMTP/POP3/Logging servers Multiple domain support User Aliases with multiple destination mail boxes The ability to define banned IP addresses Includes a friendly user interface to make configuration effortless Real-Time monitoring of all services, Real-Time statistics so server administration is a breeze and fun.
Version 1.2.38 changed statistics logging to use the native windows performance counters so stats can be monitored using the built-in windows performance monitor from any computer. Add additional error messages in the case that the incoming mail message lacked a SMTP from or SMTP to address.