+sub _rule2string {
+ my $rule = shift;
+ my($priority, $name, $conditions, $actions, $comment) = @$rule;
+ $conditions = join(', ', map { my $a = $_; join(' ', @$a); } @$conditions);
+ $actions = join(', ', map { my $a = $_; join(' ', @$a); } @$actions);
+ ("Mail rule $name" => "$priority IF $conditions THEN $actions ($comment)");
+}
+