Moreover, when that service eventually starts charging you, and/or goes out of business, or gets EOL'd by the supplier, you'll be screwed, because you'll need to get everyone who emails you to adopt your new email, which is a massive pain in the ass. Also, it'll break all your web accounts that use an email address. A huge disruption. If you had your own domain, you could switch its hosting provider transparently without affecting the email everyone uses to contact you. It's a no-brainer today.