I can send emails but not recieve - code NXDOMAIN

I can send emails but not recieve - code NXDOMAIN

Today I stopped receiving emails to my adress  emma@trojascenkonst.se  which is hosted by Zoho. I sent a number of test emails and I got this reply: 

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Delivery to the following recipient failed permanently:

      emma@trojascenkost.se

Technical details of permanent failure:
DNS Error: 97167788 DNS type 'mx' lookup of  trojascenkost.se  responded with code NXDOMAIN
Domain name not found:  trojascenkost.se

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I can still send emails, and even receive from some domains, but I can not receive from gmail for example. 

What can be wrong and what can I do about it?

Thanks for any help! 

Best regards,
Emma Örn