Yahoo mail added yahoo.in domain and it can be used by existing yahoo india users, who have signed up for email Id under the domain yahoo.co.in.

Yahoo.in email users can send or receive emails under yourname@yahoo.co.in and users under yahoo.co.in can send or receive emails under yourname@yahoo.in

you can access Yahoo email easily from the following domains.

mail.yahoo.com
mail.yahoo.in
mail.yahoo.co.in