[dmarc-discuss] Include statement in DMARC DNS record

Ben Clifford benc at cqx.ltd.uk
Fri Jun 1 14:08:56 PDT 2012

On Jun 1, 2012, at 8:32 PM, Jesper Knudsen wrote:
> Maybe I am slow here Friday evening, but I cannot see how a CNAME will help
> me "dynamically" changing DMARC record parameters for my customers domains.

as an example, rather than the existing

$ host -t txt _dmarc.cqx.ltd.uk
_dmarc.cqx.ltd.uk descriptive text "v=DMARC1\;p=none\;rua=mailto:3142 at dm.barwen.ch\;ruf=mailto:3142 at dm.barwen.ch\;ri=86400"

instead I configure

_dmarc.cqx.ltd.uk CNAME customer-1-arbitrary-foo.scanmailx.com

and you configure

customer-1-arbitrary-foo.scanmailx.com TXT v=DMARC1\;p=none\;rua=mailto:3142 at dm.barwen.ch\;ruf=mailto:3142 at dm.barwen.ch\;ri=86400

Now you can change that TXT record as you please, with no action on my part.


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