Hello Anh,
once you purchase a hosting space, in the webhosting section a button to purchase a domain should be present.
Once the domain is purchased, you can then create e-mail addresses associated with that domain, such as info @ yourdomain, support @ yourdomain and so on.
The part after the @ will depend on the domain

Eric

Dear Eric C

I have been waiting for approval for too long. I don't know what is wrong?

Anh

Hi Eric C

I got this problem. Please help. Thanks

Hello Anh,
you probably visited the website when the SSL certificate was still activating.
Checking now, I see the page warning that the website has not been uploaded yet, but no warnings about secure connection.

Eric