source: http://www.securityfocus.com/bid/9692/info

Metamail has been reported prone to multiple vulnerabilities that may provide for arbitrary code execution. Two buffer overflow vulnerabilities have been reported to affect Metamail. Additionally, two format string-handling vulnerabilities have been reported. These issues may also be exploited by a remote attacker to execute arbitrary code. 

http://www.exploit-db.com/sploits/23728-1.splitmail

http://www.exploit-db.com/sploits/23728-2.tgz

http://www.exploit-db.com/sploits/23728-3

http://www.exploit-db.com/sploits/23728-4

http://www.exploit-db.com/sploits/23728-5