Recently my mobile me family pack account was up for auto renewal. The main account renewed fine, but my wife’s account (sub-account in the family account) stopped working one fine day. No warnings, no alerts, just authentication errors on the iphone mail app.
Taking a closer look at my me.com account settings showed that there were no sub-accounts any more! *Poof*! FAIL!
After some investigation I found that not only had the sub-account become orphaned, but also stopped receiving emails. Using the me.com sub-account Assign account feature & Convert Existing Account option I was able to link it back. But the days while the account was unlinked, all email probably bounced back as there are no emails in the sub-account for the duration it got orphaned. So much so for “auto renewal” and paid “services” from Apple.