Silent email filtering makes iCloud unreliable
We have received reports from users and also Macworld/infoworld that the iCloud/me.com email system blocks messages without even allowing them go to spam. Our welcome email which contains your password also gets caught up in these blocks. For this reason, we recommend not using iCloud email as you will never get your welcome email. Apple is aware of this issue and we have reported it to Applecare as they recommended.