A security issue affects the following Ubuntu releases:
Ubuntu 4.10 (Warty Warthog)
The following packages are affected:
postfix
The problem can be corrected by upgrading the affected package to version 2.1.3-1ubuntu17.2. In general, a standard system upgrade is sufficient to effect the necessary changes.
Details follow:
This is an update to the recently published Ubuntu Security Notice USN-74-1, which fixed the delivery of arbitrary mail to any MX host which has an IPv6 address.
Unfortunately that upgrade revealed an error in the package upgrade system which caused package installation to fail. After the failed upgrade the Postfix server was not started again, thus no mail was delivered.
This new set of packages fixes the error encountered when upgrading.