Secunia Security Advisory – Stefan Schmidt has reported a vulnerability in Postgrey, which can be exploited by malicious people to cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/37171/sa14958.txt
Source: https://packetstormsecurity.com/files/37171/Secunia-Security-Advisory-14958.html