How would anyone get your email address from a Forum member? Unless you provided it to the member, in which case you should be able to figure out who you gave it to.

Private email sent from within PCQandA should be identifiable - but that would have to be sent by a member.

If you use Mailwasher, assuming you haven't deleted the message from the server, it might provide a clue. Right click the Subject in Mailwasher, then click "View complete header".

Jim.