One of my clients does not receive certain emails. I first contacted OVH who referred me to Cloudflare. Do you have any idea?
This is a system-generated message to inform you that your email could not
be delivered to one or more recipients. Details of the email and the error are as follows:
<xxx@>: Host or domain name not found. Name service
error for name=` type=A: Host not found, try again
Reporting-MTA: dns; *****************
X-Postfix-Queue-ID: 0C993C807DB
X-Postfix-Sender: rfc822; xxx@*****************
Arrival-Date: Wed, 11 Jan 2023 13:43:10 +0000 (UTC)
Final-Recipient: rfc822; @
Original-Recipient: rfc822;xxx@**********
Action: failed
Status: 4.4.3
Diagnostic-Code: X-Postfix; Host or domain name not found. Name service error
for name=***************** type=A: Host not found, try again
It is not obvious why OVH would recommend you seek assistance on the Cloudflare forums. You have not provided any relevant information that can be used to answer your question, either.