Mixed emotions here. Initially, all I can think of is FFS how can you ar$e it up, but then, having worked in IT for years, I've been there myself when you run something and suddenly realise it's fecked up and you just have that sinking feeling in the pit of your stomach.
Having said that, I'd be curious as to what level of testing they've done and who signed it off. Email being sent to people on less points you'd imagine would be one of the first testing scenarios on the test plan!!