Debian Security Advisory 1629-2 – Due to a version numbering problem, the Postfix update for DSA 1629 was not installable on the i386 (Intel ia32) architecture. This update increases the version number to make it installable on i386 as well.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/69223/dsa-1629-2.txt
Source: https://packetstormsecurity.com/files/69223/Debian-Linux-Security-Advisory-1629-2.html