The "Mailbox Box" subsection is only visible if you purchased Web Hosting and Email Hosting
If you don't have email hosting and want to purchase it, you can do so by doing the following:
1. Log into your Dynadot account. 2. Scroll down to the "Dynadot Hosting" box. 3. Select the domain that you want to add email hosting to, and click the box titled "Add Email" 4. Proceed through checkout.
To add a new email address to your email enabled hosting account, this is what you do:
1. Log into your Dynadot account. 2. Look for the "Dynadot Hosting" box at the bottom of the page. Look for the "Edit Site" column and click the "[edit website]" link to access your web hosting. 3. A new browser window should open displaying the statistics for your web hosting plan. To create email addresses for your domain email, click the "Admin" section link and then click the "Mailbox Admin" subsection link. 4. Enter in the email address you want to create, and then click the "Create New Mailbox" button to create it.