[Mimedefang] Email 101

[-]

--- On Tue, 3/16/10, Ben Kamen <bkamen at benjammin.net> wrote:
> On 3/16/2010 11:08 AM, Jason Bertoch wrote:
> Ooo, and maybe mention (although possibly not a '101'
> subject) the TXT record used for things like SPF? (although
> maybe no longer relevant)

I disagree with this.  There was a glancing mention of SPF, and anyone who has PROPERLY implement the DNS side of the anti-forgery technology should have done so using the SPF-RR.  The TXT-RR was a TEMPORARY measure until IANA logged and issued its own type (as was done in 2006, granting type 99 for this purpose).  This is 2010:  All SPF additions to DNS should be done using the SPF-RR ONLY.

People have had FOUR YEARS to upgrade their DNS server software to accomodate this the way it was designed.  With the upcoming deployment of DNSSEC in the root servers, all DNS software should be upgraded to handle this.  Therefore, there is NO EXCUSE for using TXT-RRs for SPF purposes today.