I actually just got someone else to switch to MobileMe to
resolve an email issue. Apple stores the MobileMe SMTP settings in
a proprietary location, so CCC won't show your MobileMe account in
the popup menu automatically. If you enter the settings manually,
though, you should be able to send email from that account. The
smtp server is "smtp.me.com", authentication is "password", and the
username is whatever comes before the "@me.com".
If those settings still aren't work, we can trace the sending of
a test email to see what's going on:
Hold down the Option key and select "Show experimental options"
from the Help menu
Click on the "Set debug level" button
Check the box next to "LOG_SIMPLESMTP"
Open CCC's Scheduler window and click on the Notifications
Click the "Send test email" button, then wait a few seconds for
the email to send
Submit your logs via the "Submit Logs" tab of CCC's Help