How to protect your domain from competitors that threaten?

Question

Domain name market

In general, I have a site easycsgobets.com, I am finishing the new version of the site and transferring it to csgobets.guru, the work remains for a couple of weeks. There are 20 sites with this kind of analytics in English. Internet and even more in Russian. as well as publics in contact.
10 minutes ago I received an email from a kind of main competitor of the site - csgo.guru, the contents of the email:
From: TheGuru
Subject: Contact Us - Don't do something extremely stupid.
Message Body:
Since looks like you registered the csgobets.guru domain, I warn you in advance.
Both Csgo Guru and Csgo Bets Guru, together with their original content, features and functionality are exclusive property of SHADE SRLS/LLC and its licensors. The Service, Logos, Names and Content are protected by copyright, trademark, and other laws of both the United States of America and Italy. Our trademarks and trade dress may not be used in connection with any product or service without the prior written consent of SHADE SRLS/LLC.
This means that using csgobets.guru for something related to esports-betting-CounterStrike will result in a legal action against you, together with a take-down notice to your service provider.
There are PLENTY of names around, so please don't be a fool and pick a different domain.
Cheers.
--
This e-mail was sent from a contact form on Easy CSGO Bets ( http://www.easycsgobets.com)
Can I send it far and for a long time? I think I saw a similar topic on the toaster a couple of weeks ago, but I can't find anything. As I understand it, if I don’t copy anything from them and I bought this domain name, then, logically, I can do whatever I want, then do with it? And can I continue to cut my project there?

Answer 1

there is no trademark registered in the US with the word CSGO
tmsearch.uspto.gov/bin/gate.exe?f=searchss&state=4...
so if the content is your own, the domain is acquired absolutely legally - I would send it.