Is mozmail.comdisposable?

No, private relay

mozmail.com is a private email relay from Firefox Relay. It forwards mail to someone's real inbox, so there's a person behind it. We don't treat it as disposable, even when an open list does.

Clerks at long desks in the Dead Letter Office, its name painted on the back wall — The Dead Letter Office. Mail that could not be delivered was sorted here.

Why we say this

How the data is built, and what it can’t tell you.

mozmail.com is on our list of private email relays, each taken from the service's own pages. A relay is never disposable, so no list changes this answer.