OK Big Guy-- coupla angles to look at, prolly no help in them--
1. So.... people you want to be in communication have not lost YOUR email address... why not just sit in quiet confidence that you will be hearing from them?
2. Jokes-- what about jokes-- did you routinely save text copies that would include the headers?????? ALl it takes is one from each person, and most people eventually send ONE.... NO?????????? (shock)
3. Did you ask your ISP for help-- investigate yourself via their records? (Hm, if we tell your employer about this, and let them know what a dangerous character you are..... they'll even PAY for the work! :~) )
4. Assuming it's the home puder, cuz at work MIS would have some clues hiding in periodic system backups.... ??????-- so what about those addys on the work puder-- gotta be some duplication???
5. And... what about home-MIS, in other words the fair Miz Dalee? She cain't hep you recover? No home-backup convention in place (hint-hint establish one system wide)
WHO is Keeper of the Fambly Commoonicayshuns? Oh, sorry, right, that was you...
6. (brightly) I bet Miz Barky has some of the addys you want, did you ask her to give them up?
7. You said Microsoft-- Are you SURE Microsoft Access has not grabbed these all for you when you were not looking???
8. Last angle-- if I had done it, how would you advise me when you rode to the rescue, after you got done teasing me about having not had a Mac? :~)