When the first domain record is a CNAME, why are MX records not allowed?

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When the first domain record is a CNAME, why are MX records not allowed?

Updated: 2010/03/16Viewed times: 10946

RFC 1034 published by the Internet Engineering Task Force (IETF) recommends the following:

"If a CNAME resource record is present at a node, no other data should be present; this ensures that the data for a canonical name and its aliases cannot be different. This rule also insures that a cached CNAME can be used without checking with an authoritative server for other resource record types."

We do have a workaround for this issue.

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When the first domain record is a CNAME, why are MX records not allowed?

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