icloud.com email
How do I make a new iclou.com email for my existing apple ID?
The mail app won't start?
You cannot connect?
On what hardware?
Did you try logging into iCloud.com and checking mail from there? Use Mail on iCloud.com - Apple Support
What is the exact message?
Click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
Contact Apple for support and service --> "See a list of Apple phone numbers around the world."
Click here --> https://support.apple.com/HT201232