No, it's the difference between "someone sent me this file" (should always be expected) and "so-and-so sent me this file" (should not be expected). If the file

No, it's the difference between "someone sent me this file" (should always be expected) and "so-and-so sent me this file" (should not be expected). If the file you sent is something that by its intended contents (as opposed to hidden metadata etc) could only have come from you, then WTF are you doing sending it in for publication if you don't want people to put two and two together?