Fixed #5288 Wrong permissions of dkim cert folder on CentOS 7

install/dist/lib/centos_base.lib.php

@@ -111,6 +111,25 @@ class installer_centos extends installer_dist {
 
 		removeLine('/etc/sysconfig/freshclam', 'FRESHCLAM_DELAY=disabled-warn   # REMOVE ME', 1);
 		replaceLine('/etc/freshclam.conf', 'Example', '# Example', 1);
+		
+		// get shell-group for amavis
+		$amavis_group=exec('grep -o "^amavis:\|^vscan:" /etc/group');
+		if(!empty($amavis_group)) {
+			$amavis_group=rtrim($amavis_group, ":");
+		}
+		// get shell-user for amavis
+		$amavis_user=exec('grep -o "^amavis:\|^vscan:" /etc/passwd');
+		if(!empty($amavis_user)) {
+			$amavis_user=rtrim($amavis_user, ":");
+		}
+		
+		// Create the director for DKIM-Keys
+		if(!is_dir('/var/lib/amavis')) mkdir('/var/lib/amavis', 0750, true);
+		if(!empty($amavis_user)) exec('chown '.$amavis_user.' /var/lib/amavis');
+		if(!empty($amavis_group)) exec('chgrp '.$amavis_group.' /var/lib/amavis');
+		if(!is_dir('/var/lib/amavis/dkim')) mkdir('/var/lib/amavis/dkim', 0750);
+		if(!empty($amavis_user)) exec('chown -R '.$amavis_user.' /var/lib/amavis/dkim');
+		if(!empty($amavis_group)) exec('chgrp -R '.$amavis_group.' /var/lib/amavis/dkim');
 
 
 	}