- Failing to check out the publish in most cases. Eventually, most put up mounted mailbox knockdowns occur considering the fact that the steel publish supporting the mailbox has severely rusted. Wooden posts also rot over time and turn out to be vulnerable. It is hence important that you simply assess the posts most likely and participate in common preservation as good. In case the post already has some indicators of harm, restore it or have it fixed by using experts. Whether it is beyond repair, exchange the put up with a new one immediately.