accessing zoho mail

i created my zohomail account.
i have myname@zohomail.com

i've set up to use my domain name.
i created a user :
me@mydomain.com

but i can't find where i can access emails sent to me@mydomain.com
when i login using my superuser account, all i see is me@zohomail.com

what am i missing?

all dns, mx records are set and correct.
just not sure where to login for mydomain

thanks