Debian Linux Security Advisory 1981-2 – The latest DSA for maildrop introduced two regressions. The maildrop program stopped working when invoked as a non-root user, such as with postfix. Also, the lenny version dropped a dependency on the courier-authlib package.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/85745/dsa-1981-2.txt
Source: https://packetstormsecurity.com/files/85745/Debian-Linux-Security-Advisory-1981-2.html