I apologized as I know this has probably been asked before, but...

- I had two friends register but did not receive an email confirmation. One had a @hotmail.com account, the other an @xxx.edu account. Why is this happening? Is there anything I can do to prevent/manage accounts that don't receive an email confirmation?
- I had to manually change these new accounts to "valid". After changing these accounts to valid, what happens on the new users end? Does the email confirmation get sent automatically to them? or...? I just want to know if the new user is notified at all that they are now able to sign in/post etc.
- Is there any way to be notified/alerted for any accounts that have not received an email confirmation?
