Unable to access email

Hello, I hope my message finds someone. Me and my fellow colleagues unable to receive email from third-party for the past few weeks. We contacted our email hosting site Vodien to help us, upon checking we noticed that the our company’s ‘avamech.com’ is not added in dns record. I hope someone can help us to add dns record for our email. avamech.com = mx record = mail.avamech.com