SmartMail Server 2.0 allows remote attackers to cause a denial of service (crash) by sending data and closing the connection before all the data has been sent.
Buffer overflow in SmartMail Server 1.0 Beta 10 allows remote attackers to cause a denial of service (crash) via a long request to (1) TCP port 25 (SMTP) or (2) TCP port 110 (POP3).