if you have "cr2" as part of the name then I would suggest erasing that part of of title and just use the name of item and not the file extension type as this can be trouble than you think.

If you still have issues you could use "Yousendit" or "Rapidshare", but if you use either of these I would suggest locking the zip file with a password that you can send to the eventual reciever for he/she t to be able to un-lock it.