When i use a Gmail email address for order products in my store, then its work fine.
I receive registretion email and order confirmation email as a customer.
But when i use a yahoo email address for as a customer registretion and placed a order in my store, i do not receive registretion email and order confirmation email.
Please help me to fix the problem.
I want all other emails work fine in my store for customers.
Please.

I newly created a AbanteCart store.
My store is- eshopee.meximas.com, this website is created by Hostinger.in.
And now my question is, i test my products order.
I order products as a customer in my store.
And i use different email address for order.
But when i placed an order in my store, then i do not receive Order Confirmation email as a customer to my different email address.
Why?
And when i use a gmail email address for test order, then i receive confirmation email as a customer to the email.
But when i use a yahoo mail address as a customer, then i do not receive order confirmation email. Why?
Now what should i do?
Please tell me as soon as possible.
Its ****** please.
Please tell me.