When registering a new domain name or changing contact email in already created contact, we do not recommend to use the same email as is the domain name (for example: do not use firstname.lastname@example.org
as a contact email for domain name yourdomain.com
In a case of domain malfunction (reasons can be any, for example: domain expiration, its late renewal, DNS malfunction...) problems may occur - your domain contact email will not be available.
The contact email is used for example for sending access data for administration,
password for transfer (AuthID) and etc.