It depends a bit on the reason you got blacklisted, and how well known you are as a submitter.
If you did something really forbidden, you are shit outtta luck. get a new domain and start again, and don't do whatever it was that you did.
If it was a 404, you might ask politely here to have the blacklisting lifted, explaining why a page went 404.
If it was roman moroni, or however it is they spell that, I'm just not sure, I have no experience with that.
No matter what, getting a new domain, and not doing whatever it is they say you did, is a viable solution.
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