Secunia Security Advisory – OpenBSD has issued an update for sendmail. This fixes a vulnerability, 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/49517/sa21641.txt
Source: https://packetstormsecurity.com/files/49517/Secunia-Security-Advisory-21641.html