CAA iodef clarification

Tony Finch dot at
Thu May 14 17:54:02 UTC 2020

rams <bramesh80 at> wrote:
> On the CAA record iodef filed, do we force this to be unique or can it
> match a CNAME?

The specification says the iodef field contains a URL so normal URL
resolution applies.

Questions about CNAMEs are at the wrong layer. HTTP URLs can refer to
CNAMEs; email addresses only use CNAMEs if you like tackling
interoperability problems dating from the 1980s.

f.anthony.n.finch  <dot at>
South Utsire, Forties, Cromarty: Westerly 4 to 6, increasing 7 at times in
north Forties and South Utsire. Slight or moderate in west Cromarty, otherwise
moderate occasionally rough. Showers. Mainly good.

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