I have a nice memorable rejection letter. After sending hundreds myself, I received a nice personal reply from Corsair (in French, although I did apply to them with a CV in French).
They informed me that unfortunately with my hours and lack of experience, there were no positions. But that as soon as I reach 4000 hours and have a 747 Type Rating to send back this letter and updated CV and we could go from there. A very nice touch, after so many rejections or even worse - not having the decency to reply!
Currently on 1100 hours (instructing), but once I reach that magic number - I may well give them a call.