I certainly will. While I was driving home today their VP of Security phoned (It rolled to voice mail. I don't talk on the phone while driving.) and wanted to assure me she wasn't a prank caller and that retrieving these mails is very important to their company and they would be willing to compensate me for my time.
Frankly, if these mails will get to their intended recipients I see no down side to handing them over and would do so regardless of compensation. I intend to treat these the way I would want mine treated if my own mail were mishandled in this way. Its not like I don't still have copies if "what e-mails?" denial occurs. I'm reasonably sure any compensation they would offer would come with a non-disclosure. Now comes the sticky part. Other privacy issues aside, based on what I've seen I'd be surprised if at least one or more of these mails being in the wild isn't a HIPAA violation. Of course they want to keep this quiet as this could be very damaging to them from a PR standpoint. My concern is if they're trying to duck some legal ramifications. Which could make me an accessory to any cover up they may be engaging in.
Or maybe I watch too many conspiracy movies.
The VP of Security called you instead of emailed you, huh? Wise choice.
Because the situation you find yourself in is an odd one, Dean, it is difficult to tell what all of the possible consequences are for the ISP - or for you. Right now, you are a "victim" of the ISP's mistake, just as are all of the others whose mail was diverted to your account. Being a victim is probably the best position for you to be in.
I would not respond to the ISP's offer of compensation, to requests to sign an NDA or to do anything with the emails until you have had the opportunity to sit down and discuss all of this with an attorney in your area.
I do not see this as something you should handle on your own without the help of an attorney. That said, I appreciate the fact that you want to get the emails to their intended recipients. If the ISP was going to make a mistake of this magnitude, at least they made it with someone who is honorable.
Good luck.