private void buttonDeleteCriteria_Click(object sender, EventArgs e)
{
foreach (ListViewItem item in listCriterias.SelectedItems)
{
hMailServer.RuleCriteria ruleCriteria = item.Tag as RuleCriteria;
ruleCriteria.Delete();
}
ListRuleCriterias();
_forcedDirty = true;
EnableDisable();
}