How can I config an email account in Apple Mail with my own domain?
Since you don't provide any more info about your email service, you must do some of the next:


Go to your TLD admin panel, must of them already have documentation about how to configure this.
Can you access it via web? something like webmail.MyDomain.info? if so, there could be some documentation in there too.
have you already tried adding your account via


Settings > Internet Accounts > Add ( + button) > Add Other Account...

Most of the times this should work