I cannot receive or send emails and my connection doctor states that Cannot Connect to mobile.me IMAP server. I checked my account preferences and the incoming mail box has a grey: mail.example.com in it and I cannot override that. Please help.
iMac
What OS X version are you using? (Your reference to MobileMe implies your OS X version might not be a recent OS X version.) (If you're not sure which OS X version you're using, > About This Mac will provide details.)
If the account entry in mail is somehow corrupted, you can delete the account, and re-add it.
If you're using a recent OS X version (OS X 10.7.2 or later), re-adding the account will usually be as an iCloud account entry, and an automatic iCloud account setup is available. If it's an OS X version before 10.7.2, then you'll be adding the account and referencing the servers differently.
my connection doctor shows the red light...no connection to my mail server. when i get into account preferences, the outgoing mail server has mail.example.com as the outgoing server and I cannot override it. I cannot get thru to apple care
