On 15 Mar 2019, at 14:35, Mike Tubby via Exim-users wrote:
On 15/03/2019 14:54, Jeremy Harris via Exim-users wrote:
On 15/03/2019 14:36, Mike Tubby via Exim-users wrote:
Does the use of a CNAME in this case violate an RFC?
I've not looked hard to find one. The original RFC
for SRV doesn't mention CNAME.
Discussion here:
https://serverfault.com/questions/765743/published-srv-records-pointing-to-cname-alias-in-violation-of-rfc-2782
Not really.
That refers to the name which is the "Target" field of a SRV record,
which must (as with the "Host" field of a MX record) be a name with an A
and/or AAAA record and NOT a CNAME record.
In this case, the name being asked about (which has a SRV label format)
has a CNAME record (as a consequence of an apparent wildcard CNAME,) so
that is what any query for that name gets as a reply.
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Bill Cole
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