[snowwrestler]

It's rude not to email you back, but then again they don't know who you are or for sure how you got that info--all they know is that you have their sensitive data. Some lawyer probably advised them to act on the info but not communicate with you.

You've done a Good Thing, but like many good things, it will most likely go unrewarded.

[JungleCats]

Yeah, I guess you are right. It's more that I expected a simple "Thanks" for ensuring that they didn't end up on the front of the New York times at some stage.

[logn]

Fortune 100 companies are definitely aware that anything in email is evidence. I doubt anyone wants to admit negligence or anything. And by offering you some big thanks they only validate that they were real passwords and not some junk data.

For an enormous corp to take down a file in a couple of weeks is thanks and recognition enough I think.

[dpweb]

You might have gotten some admin or mid-manager. Maybe they wanted to cut off communications (pretend it never happened) before their boss finds out about it. Seen guys do that before..