MX record for one of sub-domain is missing intermittently

[nazzer]

pusaraman.mosque.sg DNS information - who.is -

There MX record for the sub-domain pusaraman.mosque.sg is missing.
Email for this sub domain is subscribe on Google Workspace (Email services)

The sub-domain user are not able to receive email from external.

Please assist.

[cscharff]

There is not a query for that subdomain in the screenshot provided.

What error message is received for mail sent to the subdomain in question.

[nazzer]

Hi @cscharff , when external party is trying to sent email to domain “pusaraman.mosque.sg” it indicate unavailable

[epic.network]

You have published pusaraman.mosque.sg as a CNAME.

Per RFC 1912

2.4 CNAME records

A CNAME record is not allowed to coexist with any other data. In other words, if suzy.podunk.xx is an alias for sue.podunk.xx, you can’t also have an MX record for suzy.podunk.xx, or an A record, or even a TXT record.

This means that as long as you have a CNAME at pusaraman.mosque.sg, the MX records at the same name will be ignored.

You may have a CNAME or MX, not both. Pick one.

[nazzer]

so you are saying MX record cannot have CName entry?

[epic.network]

The rules that govern DNS say it. I’m just sharing those rules with you since you are encountering their effects.