You could classify one-off email addresses or single-use email addresses based on their life. Some throwaway email addresses are auto-destruct, which means that such email addresses will turn invalid quickly, say, after twenty minutes. Any emails you send to such addresses after that will hard-bounce.
Other disposable email addresses may not self-destruct, but a different person accesses it every time. That means there’s no scope of building a relationship.
Disposable email addresses may also be classified on the basis of who has the right to access the inbox. Some of these DEAs have public inboxes, which means anyone knowing the email address can access it.
Alternatively, there could be disposable email addresses with private inboxes so that only someone with the password can access it.
Some disposable email address may only be able to receive emails while others may be used to receive as well as send emails for a very short time.