[Bug 2151806] [NEW] postfix/gpg-wks-server breaks 26.04 upgrade

Thu May 7 14:51:54 UTC 2026

Public bug reported:

First...

dpkg: dependency problems prevent configuration of gpg-wks-server:
 gpg-wks-server depends on default-mta | mail-transport-agent; however:
  Package default-mta is not installed.
  Package postfix which provides default-mta is not configured yet.
  Package mail-transport-agent is not installed.
  Package postfix which provides mail-transport-agent is not configured yet.

dpkg: error processing package gpg-wks-server (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.

Then after lots of config...

Could not install the upgrades 

The upgrade has aborted. Your system could be in an unusable state. A 
recovery will run now (dpkg --configure -a). 

Setting up postfix (3.10.6-4ubuntu2)…
postconf: fatal: open /etc/postfix/main.cf: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
dpkg: error processing package postfix (--configure):
 old postfix package postinst maintainer script subprocess failed with exit status 1
dpkg: dependency problems prevent configuration of gpg-wks-server:
 gpg-wks-server depends on default-mta | mail-transport-agent; however:
  Package default-mta is not installed.
  Package postfix which provides default-mta is not configured yet.
  Package mail-transport-agent is not installed.
  Package postfix which provides mail-transport-agent is not configured yet.

dpkg: error processing package gpg-wks-server (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 postfix
 gpg-wks-server

Same doing apt install -f afterwards:

Setting up postfix (3.10.6-4ubuntu2)…
postconf: fatal: open /etc/postfix/main.cf: No such file or directory
postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
dpkg: error processing package postfix (--configure):
 old postfix package postinst maintainer script subprocess failed with exit status 1
dpkg: dependency problems prevent configuration of gpg-wks-server:
 gpg-wks-server depends on default-mta | mail-transport-agent; however:
  Package default-mta is not installed.
  Package postfix which provides default-mta is not configured yet.
  Package mail-transport-agent is not installed.
  Package postfix which provides mail-transport-agent is not configured yet.

dpkg: error processing package gpg-wks-server (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          Errors were encountered while processing:
 postfix
 gpg-wks-server
Notice: Ignoring file 'google-chrome.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
Notice: Ignoring file 'devel.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
Notice: Ignoring file 'ddebs.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
Error: Sub-process /usr/bin/dpkg returned an error code (1)

** Affects: ubuntu
     Importance: High
         Status: Triaged

** Affects: gnupg2 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: postfix (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: rls-rr-incoming

** Summary changed:

- gpg-wks-server breaks 26.04 upgrade
+ postfix/gpg-wks-server breaks 26.04 upgrade

** Also affects: gnupg2 (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: postfix (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/2151806

Title:
  postfix/gpg-wks-server breaks 26.04 upgrade

Status in Ubuntu:
  Triaged
Status in gnupg2 package in Ubuntu:
  New
Status in postfix package in Ubuntu:
  New

Bug description:
  First...

  dpkg: dependency problems prevent configuration of gpg-wks-server:
   gpg-wks-server depends on default-mta | mail-transport-agent; however:
    Package default-mta is not installed.
    Package postfix which provides default-mta is not configured yet.
    Package mail-transport-agent is not installed.
    Package postfix which provides mail-transport-agent is not configured yet.

  dpkg: error processing package gpg-wks-server (--configure):
   dependency problems - leaving unconfigured
  No apport report written because the error message indicates its a followup error from a previous failure.

  Then after lots of config...

  Could not install the upgrades 

  The upgrade has aborted. Your system could be in an unusable state. A 
  recovery will run now (dpkg --configure -a). 

  Setting up postfix (3.10.6-4ubuntu2)…
  postconf: fatal: open /etc/postfix/main.cf: No such file or directory
  postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
  dpkg: error processing package postfix (--configure):
   old postfix package postinst maintainer script subprocess failed with exit status 1
  dpkg: dependency problems prevent configuration of gpg-wks-server:
   gpg-wks-server depends on default-mta | mail-transport-agent; however:
    Package default-mta is not installed.
    Package postfix which provides default-mta is not configured yet.
    Package mail-transport-agent is not installed.
    Package postfix which provides mail-transport-agent is not configured yet.

  dpkg: error processing package gpg-wks-server (--configure):
   dependency problems - leaving unconfigured
  Errors were encountered while processing:
   postfix
   gpg-wks-server

  Same doing apt install -f afterwards:

  Setting up postfix (3.10.6-4ubuntu2)…
  postconf: fatal: open /etc/postfix/main.cf: No such file or directory
  postconf: fatal: open /etc/postfix/main.cf for reading: No such file or directory
  dpkg: error processing package postfix (--configure):
   old postfix package postinst maintainer script subprocess failed with exit status 1
  dpkg: dependency problems prevent configuration of gpg-wks-server:
   gpg-wks-server depends on default-mta | mail-transport-agent; however:
    Package default-mta is not installed.
    Package postfix which provides default-mta is not configured yet.
    Package mail-transport-agent is not installed.
    Package postfix which provides mail-transport-agent is not configured yet.

  dpkg: error processing package gpg-wks-server (--configure):
   dependency problems - leaving unconfigured
  No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                            Errors were encountered while processing:
   postfix
   gpg-wks-server
  Notice: Ignoring file 'google-chrome.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  Notice: Ignoring file 'devel.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  Notice: Ignoring file 'ddebs.list.migrate' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
  Error: Sub-process /usr/bin/dpkg returned an error code (1)

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