Scott Kitterman wrote:
There was recently a long thread on the DKIM mailing list about DKIM use of
TXT versus a dedicated RR type. It started here:
http://mipassoc.org/pipermail/ietf-dkim/2005q4/001355.html
and allong the way, Frank made an interesting suggestion:
http://mipassoc.org/pipermail/ietf-dkim/2005q4/001417.html
How about DKIM using Type 99 instead of waiting for it's own record type to
get established by the IANA? As I understand it there is no risk of
collision due to where DKIM puts it's records.
Now there is an ongoing debate (that won't be settled for some time) about
whether or not DKIM will just stick with TXT or in the end be forced to a
dedicated record type, so no final decisions could be made now, but I think
it might make sense for SPF to support this:
For SPF, it increases the incentive for DNS vendors to support Type 99.
For DKIM, it lets them get on with it early. It gives them more chance to
experiment with how to deal with multiple record types (we couldn't actually
try it until after the IESG had approved the draft).
The only downside I can see is that it might have a negative impact on
wildcard SPF records for domains that do both SPF and DKIM.
This is, BTW, the sort of thing that I think should be decided within the SPF
community by the council after discussion here. So, please discuss....
I think SPF should use its own record type. And likewise DKIM. But of
course getting the own record type was something that was delayed by the
DNS folks due in part to the objection to the use of SPF in general
and/or the use of TXT for SPF in particular.
*sigh*
On the other hand DNS servers/cache's should not hardcode and thereby
limit the deployment of new record types (ahem M$).
So although everyone should get and use their own record type, its
understandable when they start off not having/using their own.
BTW There was much debate about if SPF should just stick with TXT also,
but I don't think it will stay TXT forever.
Terry
Scott K
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Terry Fielder
terry(_at_)greatgulfhomes(_dot_)com
Associate Director Software Development and Deployment
Great Gulf Homes / Ashton Woods Homes
Fax: (416) 441-9085
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