Not sure if "hijacked" is the right word for what's happened, but my yahoo mailbox has been taken over and is being "controlled" by something called "ATT.NET", as a result of which about the only thing I can do is read my mail. I am unable to compose, reply or forward. Nor are any of the options available any more. It may have to do with something called "xampp" (or Apache or Fedora core) which my son downloaded just before the problem started. How does ATT.NET get away with doing this? And how do I get rid of them?