error massage when my gmail account send massage to my new webmail account, plis help?

so i make free webhosting in this great website and i use domain from exabytes free domain, i follow everything "change dns, etc, and search to solve this issues, but i still cant solve this issues

You say you can’t solve “this issues”. What are the issues exactly?

Also, it would help a lot if you could include your domain name in the message, because that makes it a lot easier to verify settings.