Setting up, get Incoming mail message "my-domain.com is currently unavailable". Yet Outgoing mail is working...?

Setting up, get Incoming mail message "my-domain.com is currently unavailable". Yet Outgoing mail is working...?

As the subject says, I've just joined and have accurately configured my Domain Name data to allow for mail (mx.zoho.com etc)

I know it my domain/host is working because I can send out of my account via SMTP. I am trying to set up on iPad iOS Mail. I have the correct SSL checked, port 993, and correct name and password. Can anyone please help?

thanks!