There may be a problem with the mail server or network. Verify the settings for account “iCloud” or try again.

Hi paulgillphoto,

Thanks for using Apple Support Communities. This article has some steps you can take for issues with iCloud Mail that may help:

iCloud: Troubleshooting iCloud Mail

http://support.apple.com/kb/TS4002

If you can't receive mail in OS X Mail

Locate the name of your iCloud account on the left side of the main Mail window. If your iCloud account name is dimmed and has a lightning-bolt symbol next to it, your account is offline. To bring your account online, make sure that your computer is connected to the Internet, then choose Mailbox > Take All Accounts Online. If that doesn't resolve the issue, follow these steps:

1. Choose Preferences from the Mail menu.
2. Click Accounts in the Preferences window.
3. Select your iCloud account from the list of accounts.
4. Click the Advanced tab and verify these settings:
   • Port: 993
   • Use SSL: (selected)
   • Authentication: either "Password" or "Apple Token"

Cheers,

- Ari