Thank you for your report.
This looks like a local configuration problem, rather than a bug in
Ubuntu.
You can find pointers to get help for this sort of problem here:
http://www.ubuntu.com/support/community
Since we use this bug tracker to track bugs in Ubuntu, rather than
configuration problem
** Information type changed from Private Security to Public
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https://bugs.launchpad.net/bugs/1888052
Title:
package postfix 3.4.13-0ubuntu1 failed to install/upgrade: new postfix
pack
