1)   Winmail Mail Server 4.3
Winmail Server is an enterprise class mail server software system offering a robust feature set, including extensive security measures. Winmail Server supports SMTP, POP3, IMAP, Webmail, LDAP, multiple domains, SMTP authentication, spam protection

 2)   SMTP Watcher 1.0
SMTP Watcher is a tool designed to monitor your SMTP servers. This program is mainly intended for use by web administrators and server administrators. SMTP Watcher sits in the windows system tray and continuously polls your SMTP server.