source: http://www.securityfocus.com/bid/813/info

The ZetaMail mail server will crash if a username/password pair longer than 3500 characters is supplied by the client. 

19636-1.exe - binary for windows
19636-2.zip - source for windows
19636-3.tgz - source for linux 

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/19636-1.exe

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/19636-2.zip

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/19636-3.tgz