Using Your Own Custom Domain
If you'd like to use your own custom domain for creating the email forwarders you'll use when sending from your Happy Grasshopper account that is fine. Just be aware that you cannot send email from another system using this domain.
Simply notify our support team that you'd like to use your own domain and what the domain is that you will be using. Then update your domain's DNS records to point to:
How you access your DNS records depends on where your domain is registered. If you are unsure how to do this the easiest thing is to contact your register. This is a simple change and should only a take a minute to update.