Email register error: The domain is not supported or has been registered with zoho.com

Email register error: The domain is not supported or has been registered with zoho.com

Dear Zoho,

 

Can you help to analyze the problem.

My situation is:

+ I created an account in zoho.com with email: amimaysaigon@yahoo.com

+ I onwed the domain ssisoftwares.com, which registered with GoDaddy.com

+ I tried to register for the email hosting plan with zoho.com

+ After I fill in the domain name, I got the error msg as attached.

 

Could you please check how come my domain ssisoftwares.com was unable to regist?

 

Thanks,

Nguyen