Earlier quoted context omitted.
This is why I have my own domain. I have a catch-all email box that just accepts everything and can make up emails on the spot, service@example.com. It makes things a lot easier down the road if I have a problem with my current provider as I can change the MX records at will. This means though that my DNS service must be under another domain for safety though but that's less of an issue.
Do you have anything written about the components & configuration, by any chance?
1. register domain at a registrar that supports email catch all (I use namecheap, not affiliated)
2. setup email catch all (https://imgur.com/a/PTlzv) with redirect to your "real" email
3. write email to foobar@example.org -> get's redirected to your "real" email
This has the big advantage that you can change your real email account (I switched away from GMail two years ago) quite easily, you can track who leaks your address and filter more easily. But be prepared to leave some people stunned, I registered at my electricity provider with electricity@example.org or at my hairdresser with hairdo@example.org