While unsupported, iCloud still allows access to your e-mail via IMAP, and sending via SMTP. Apple has published the necessary parameters for manually configuring your e-mail client to use the iCloud service.

Server name: imap.mail.me.comSSL required: yesPort: 993 (is set by default)Username: example@me.com (use your @me.com address from your iCloud account)Password: Your iCloud passwordServer name: smtp.mail.me.comSSL required: yesPort: 587SMTP authentication required: YesUsername: example@me.com (use your @me.com address from your iCloud account)Password: Your iCloud passwordSSL is required  ...