POPBeamer is POP3 Connector for Microsoft Exchange.

POPBeamer collects messages from an unlimited number of POP3 or IMAP accounts and routes them to your Exchange server.

XWall Edge Service is a spam filter for Microsoft Exchange and other SMTP servers.

XWall protects your Exchange server from viruses, spam mail and dangerous attachments.

SMTPBeamer is a complete Internet and Intranet e-mail server featuring the SMTP, POP3 and HTTP protocol.

CryptoFilter Email Security Gateway a pass-through S/MIME gateway for Exchange other SMTP servers.