This has been so frustrating. Why can I send and receive from @me.com and @mac.com and all my other aliases but not my iCloud.com - cant receive or send.
Here is the bounceback message when trying to sent to my iCloud email address.
Delivery to the following recipient failed permanently:
xxxxx@icloud.com
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain icloud.com by mx2.mail.icloud.com. [17.178.102.83].
The error that the other server returned was:
550 5.1.1 unknown or illegal alias: xxxxx@icloud.com