Q: I can't receive email at iCloud just switched from me.com

Hi, installed ios6 and now I can set up, on iCloud.com, to send/receive email @icloud.com.

It goes out but can't receive them. I receive an email saying that XXX@icloud.com doesn't exist.

If I put it back to XXXX@me.com everything works.

How can I get the iCloud.com account working? I don't understand while it allows me to send mail but says it does not exist when receiving them.

Luca