Preparing to replace qgis-providers-common 1.9.90~ppa4 (using .../qgis-providers-common_1.9.90~ppa6_all.deb) ...
Unpacking replacement qgis-providers-common ...
Preparing to replace qgis-common 1.9.90~ppa4 (using .../qgis-common_1.9.90~ppa6_all.deb) ...
Unpacking replacement qgis-common ...
Preparing to replace qgis-plugin-globe-common 1.9.90~ppa4 (using .../qgis-plugin-globe-common_1.9.90~ppa6_all.deb) ...
Unpacking replacement qgis-plugin-globe-common ...
Setting up postfix (2.9.1-4) ...

Postfix configuration was not changed.  If you need to make changes, edit
/etc/postfix/main.cf (and others) as needed.  To view Postfix configuration
values, see postconf(1).

After modifying main.cf, be sure to run '/etc/init.d/postfix reload'.

Running newaliases
newaliases: fatal: myorigin parameter setting must not contain multiple values: Mathieu M.
dpkg: error processing postfix (--configure):
 subprocess installed post-installation script returned error exit status 75
dpkg: dependency problems prevent configuration of bsd-mailx:
 bsd-mailx 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 bsd-mailx (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of lsb-core:
 lsb-core depends on lsb-invalid-mta | mail-transport-agent; however:
  Package lsb-invalid-mta is not installed.
  Package mail-transport-agent is not installed.
  Package postfix which provides mail-transport-agent is not configured yet.
 lsb-core depends on mailx | mailutils; however:
  Package mailx is not installed.
  Package bsd-mailx which provides mailx is not configured yet.
  Package mailutils is not installed.
dpkg: error processing lsb-core (--configure):
 dependency proble