This is interesting because I guess they just sent this to everybody, including those still in the selection process.
I just received this email from Cathay Pacific too but I haven't been rejected (no rejection email). To those that just checked their emails but haven't got a clue of what it is, don't freak out. I just called Cathay and apparently they have a "new" database...to me what seems more like a way to clean up their mess...