Using email from the web hosting account is good when bundling your website and email together, and if you want to use a lot of email addresses, as there can be unlimited email addresses (it is just the combined storage space that is limited).
HelpDesk article: Money Saving Tips: Optimize Email
Our web hosting offering, which is managed by RegistryDomains but is a separate account, is at mywebhostingaccount.com.
Web hosting will give you a place to build and house a website, and it also comes with unlimited POP / IMAP email addresses. With the web hosting, there is a combined storage limit for any websites and email addresses on the web hosting account. This means you can choose how much storage you need, and that storage space is shared among everything:
Example: you choose the 5 GB web hosting plan. Your website takes up 500 MB, the email messages from the email address email@example.com currently takes up 300 MB, and messages from another email address of firstname.lastname@example.org currently takes up 1 GB. You would add all of these up to equal approximately 1.8 GB used out of the 5 GB available on the web hosting.
Note: The web hosting has its own email forwarding function also (a catch-all email forwarding address is not supported with this option).