Abstract: An impact resistant mailbox support apparatus including a mailbox support post and a mailbox having a dome-shaped body, a front door, and an attachment arm hingedly attached to the mailbox support post. The attachment arm has at least one first spring-loaded self-returning hinge. The attachment arm of the mailbox is configured to selectively swing in one of a rightward direction and a leftward direction upon impact and return to an original pre-impact position following impact as a result of the at least one first spring-loaded self-returning hinge. The mailbox support post optionally includes a lower half, an upper half pivotally attached to the lower half, and a second spring-loaded self-returning hinge. The upper half is configured to selectively rotate in one of a rightward direction and a leftward direction upon impact and return to an original pre-impact position following impact as a result of the second spring-loaded self-returning hinge.