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MX records cannot be created for domains with CNAME records. Why? Is there really no way around this? Thanks.

asked 14 Nov '14, 14:45

Geert
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accept rate: 0%


MX records cannot be created for domains with CNAME records. Why?

Because the RFCs that define the specifications for DNS say so. Specifically, from RFC 1034:

"The domain system provides such a feature using the canonical name (CNAME) RR. A CNAME RR identifies its owner name as an alias, and specifies the corresponding canonical name in the RDATA section of the RR. If a CNAME RR 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 RR types"

In other words, if a particular host name is defined by a CNAME record, then you cannot attach any other records to it.

Is there really no way around this? Thanks.

Use an A record to point your hostname to an IP address, instead of using a CNAME to point it to another hostname.

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answered 14 Nov '14, 19:59

seanf
12.2k41936
accept rate: 37%

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question asked: 14 Nov '14, 14:45

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last updated: 14 Nov '14, 19:59

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