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Re: [spfbis] Last Call: <draft-ietf-spfbis-4408bis-19.txt> (Sender Policy Framework (SPF) for Authorizing Use of Domains in Email, Version 1) to Proposed Standard

2013-08-21 11:56:02
On Wednesday, August 21, 2013 09:39:28 Andrew Sullivan wrote:
...
  * To what extent has that happened?

I'm not the shepherd, but it is undeniable that most current-era
shipping DNS servers support RRTYPE 99.

The operational issues I've encountered with actually trying to use RRTYPE99 
in the wild weren't caused by a lack of support in current-era shipping DNS 
servers.  Sometimes it's not even anything directly related to the DNS.  I 
recall cases where it appeared that firewalls were the root of the problem (I 
don't recall details, sorry).  Solving the DNS servers must support unknown 
RRTYPE/SPF type problem only gets you started.

Scott K

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