MDaemon Messaging Server
mdaemon messaging server - email server software for small to medium businesses.
Emailarchitect Email Server
a fast and secure email server supporting smtp, pop3, imap4, ssl and webmail.
wodImapServer
wodimapserver activex control is imap4 protocol server component
RaidenMAILD Mail Server
raidenmaild is an easy-to-use pop3/smtp/imap4/webmail mail server