Undelivered Mail Returned to Sender

Undelivered Mail Returned to Sender

Dear all,
I reply to an email and I got this error message:

xxxxxxx@xxxxxx.ch, ERROR_CODE :512, ERROR_CODE :5.4.4 DNS error:NXDOMAIN. Domain not found :xxxxx.xxxxx
Reporting-MTA: dns; mx.zoho.com
Arrival-Date: Fri, 28 Jun 2019 18:08:59 +0200
Original-Recipient: rfc822; xxxxx @xxxxx.ch
Final-Recipient: rfc822; xxxxxx @xxxxxx.ch
Status: 512
Action: failed
Last-Attempt-Date: 28 Jun 2019 16:09:16 GMT
Diagnostic-Code: xxxxx @xxxxx.ch, ERROR_CODE :512, ERROR_CODE :5.4.4 DNS error:NXDOMAIN. Domain not found :xxxxx.ch

Could you give me more information about this error? Since it is an important message I have to understand if it is a problem of my account or a problem from the receiver.

thanks in advance,
Matteo