spf ent txt records.

[Shane Kerr]

Hugo,

On Wednesday, 2013-03-13 11:33:35 +0000, 
hugo hugoo <hugobxl at hotmail.com> wrote:
> Dear all,
>  
> I received the following question and I am not able to aswer as spf
> records are still mysterious to me. We are using BIND 9.7.
>  
> Thanks in advance for your answers,
>  
> Hugo,
>  
>  
>  
> Does our DNS-server support SPF-type records? Or do we put SPF-info
> in a TXT-record? 
> Ref. : 
> Early implementations used TXT records for implementation before the
> new record type was commonly available in DNS software. Use of TXT
> records for SPF was intended as a transitional mechanism. However,
> according to the current RFC, RFC 4408, section 3.1.1, "An
> SPF-compliant domain name SHOULD have SPF records of both RR types. A
> compliant domain name MUST have a record of at least one type," and
> as such, TXT record use is not deprecated.[2] 

BIND does support the SPF type. Note however that the latest draft
version of SPF actually deprecates SPF, and recommends using TXT
records:

3.1.  DNS Resource Records

   SPF records MUST be published as a DNS TXT (type 16) Resource Record
   (RR) [RFC1035] only.  The character content of the record is encoded
   as [US-ASCII].  Use of alternate DNS RR types was supported in SPF's
   experimental phase, but has been discontinued.  See Appendix A of
   [RFC6686] for further information.

http://datatracker.ietf.org/doc/draft-ietf-spfbis-4408bis/?include_text=1

--
Shane