AppleID.Apple.com - Can't add Alternate Email Address
A friend of mine has an @gmail.com Apple ID and Primary Email Address. He wants to add an @me.com address as an Alternate Email Address to his Apple ID on http://appleid.apple.com. However, when he enters his @me.com address and clicks the Verify now button, nothing happens. No verification email is sent.
Why is this? Why can't he get the verification email to be sent?
iMac, OS X Mountain Lion (10.8.2), iMac (21.5-inch, Mid 2010) 12GB RAM