What about troubleshooting with mobile me mail,if my operating system on my Mac is Macos10.4.11?

Hello, do you want to setup eMail on your Mac for iCloud???

Do not delete the old account yet. sign up for an iCloud account if you haven't.

I understand .mac mail will still come through. Do not delete the old account yet.

You cannot use .mac or MobileMe as type of Account, you have to choose IMAP when setting up, otherwise Mail is hard coded to change imap.mail.me.com to mail.me.com & smtp.mail.me.com to smtp.me.com, no matter what you try to enter.

iCloud Mail setup, do not choose .mac or MobileMe as type, but choose IMAP...

On second step where it asks "Description", it has to be a unique name, but you can still use your email address.

IMAP (Incoming Mail Server) information:

•Server name: imap.mail.me.com

•SSL Required: Yes

•Port: 993

•Username: example@me.com (use your @me.com address from your iCloud account)

•Password: Your iCloud password

SMTP (outgoing mail server) information:

•Server name: smtp.mail.me.com

•SSL Required: Yes

•Port: 587

•SMTP Authentication Required: Yes

•Username: example@me.com (use your @me.com address from your iCloud account)

•Password: Your iCloud password