Ultra fast SMTP/POP3 server program. Can be used as a corporate or personal server. Use with any SMTP compliant mail client. Accept mail on behalf of your users. Simple, powerful and bullet-proof. Lots of security features to protect the server from DDoS attacks and block SPAM. Multiple SMTP gateways in case you cannot deliver your email directly to the destination. Use parameterized mailing to send customized messages to many recipients.