If keeping your mailbox door closed is a problem, it can usually be fixed by tightening or bending the adjustment tab downward so that the “U” shaped part or pull tab that is fixed to the mailbox door will have a better fit to the tab that is attached to the top of the mailbox. In some cases, the nuts holding the adjustment tab have come loose and needs to be retightened. Some lubricant spray, screwdriver and pliers or wrench should do the trick. It might also be that the adjustment tab has been bent upward after repeated use and needs to be repositioned to make better contact. In that case open the mailbox door and bend the tab downward until the pull tab and adjustment tab make better contact.
On other models there might only be a pull tab outside with a curved catch inside on the top of the door. Using a pair of needle nose pliers bend the catch toward the top of the door if the door won’t stay shut and bend away from the top of the door if it is to tight and it’s difficult to open the door.
Magnet catches are also becoming popular with some manufacturers, and sometimes they become loose over repetitive openings and closings. Repositioning and tightening should do the trick with those models.
With molded plastic or vinyl mailboxes it is a little more difficult as there are usually no catches or tabs to bend. There are plastic pull tabs and adjustment tabs pictured below that can be added.
That might be a workaround, or adding some sort of magnet or cupboard door latch may also be a possibility. A homeowner can always reach out to the mailbox manufacturer’s customer service and see if they have a specific replacement part for that product line.
