I found email providers that offer temporary email adresses. You can only receive emails and email adresses are deleted after some time. I use them to create new accounts on Microsoft and Google. On some temporary emails, you can send messages.
I never used them. I have so many regular email accounts, I can't keep track of them all.
Some of them, I haven't looked at in years.
I had used once.
No, never use them. Have one for regular mail and two more for business. My provider has that option also but I just never needed to use one.
You cannot recover passwords with them.
Not that kind