Ultra fast SMTP/POP3 server program. Send mail using any mail client complaint with SMTP protocol. Configure this server to be your corporate mail server. Accept mail on behalf of users, until users will retrieve it using POP3. Security features to protect the server from DDoS attacks and block SPAM and spammers. SMTP/POP3 servers work as NT services and without logged in users. Use multiple SMTP gateways if you cannot deliver your email directly