Google Admin Toolbox
Domain name

error pabburi.co.kr

There were some critical problems detected with this domain. Mail-flow is probably affected. Please refer to the corresponding help articles to fix these.
error
Domain must have at least one mail server.
Mail servers are either not specified or not reachable or refuse to accept mail for this domain.
warning
DKIM is not set up.
warning
DMARC is not set up.
warning
There should be a valid SPF record.
SPF record specifies Gmail's IP addresses as valid for sending domain's messages
If no other servers send mail on behalf of this domain then this record should be set to
"v=spf1 include:_spf.google.com ~all"
warning
No Google mail exchangers found. Relayhost configuration?
If you intentionally set up a mail server somewhere on your premises that automatically forwards all incoming mail to Google you may disregard this warning. Otherwise - this is a serious configuration error as it causes disruption of mail flow.
<empty response>
done
Domain should have at least 2 NS servers.
done
Naked domain must be an A record (not CNAME).
done
Every name server must reply with exactly the same TXT DKIM records.
done
Every name server must reply with exactly the same TXT DMARC records.
done
Every name server must reply with exactly the same CNAME records.
done
Every name server must reply with exactly the same NS records.
done
Every name server must reply with exactly the same MX records.
done
Every name server must reply with exactly the same TXT records.
done
MX lookup must fit in one UDP response packet.
done
TXT lookup should fit in one UDP response packet.

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