The following packages are BROKEN:
0 packages upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 24.2MB of archives. After unpacking 24.3MB will be used.
The following packages have unmet dependencies:
clamav-data: Conflicts: clamav-freshclam but 0.96.5+dfsg-1ubuntu1.10.04.4 is installed.
clamav-freshclam: Conflicts: clamav-data but 20100423.032400.10794 is to be installed.
The following actions will resolve these dependencies:
Remove the following packages:
Score is 190
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So there seem's to be a dependencie between gropoffice-mailserver, so I can't update to a new clamav.