Is the waterproof? Will rain get into the mailbox?

Mail Boss mailboxes are not fully waterproof/ water-tight - but they do a great job of keeping out the elements and keeping your mail dry! We live in the wet and rainy Pacific Northwest and all of my mail is kept secure and dry by my Mail Boss. We recommend that you mount any curbside Mail Boss with a slightly forward-leaning tilt, like 1- or 2-degree forward tilting. This will help encourage any water that lands on the flat top to roll off the protected front overhang of the shell. Feel free to give us a call at 1-800-589-7990 if you have any further questions!