I've said this before - but this is just a reminder. I'll be breaking BOTL over time in order to get it into a far better place. Just be patient if you can't reach us! We'll be back
Actually, if your mailbox is in the sun and is a dark color, I'm sure it is much hotter than the results of my experiment. You could easily test this by putting a thermometer in it on a hot, sunny day. I'd guess 120F to 140F.