Create an email account associated with your domain to make your website/business appear more professional.
To create a mailbox with your domain name:
Go to your website Dashboard.
Click the Domain button and elect Set unique domain from the list.
Click the Email Accounts button then New Email Account.
Set up your account name and password.
You can forward incoming emails to a different email by checking the Forward emails to a different mailbox checkbox and entering the destination email.
Do not forward to the same email that you just created (i.e., the email email@example.com cannot forward emails to firstname.lastname@example.org).
Save the account and click Apply.
You can create emails with SITE123 that connect to your domain only if your MX records point to SITE123. Read about Setting MX Records to SITE123.
The mailbox size is limited to 1GB, while attached files are limited to 15MB in total.