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Re: [spfbis] Fwd: RFC 7208 SPF - 4.6.4. DNS Lookup Limits increase

John Levine <johnl@taugh.com> Fri, 06 May 2022 18:05 UTC

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From: John Levine <johnl@taugh.com>
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Subject: Re: [spfbis] Fwd: RFC 7208 SPF - 4.6.4. DNS Lookup Limits increase
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It appears that Måns Nilsson <mansaxel@besserwisser.org> said:
>-=-=-=-=-=-
>
>Subject: Re: [spfbis] Fwd: RFC 7208 SPF - 4.6.4. DNS Lookup Limits increase Date: Sun, Apr 24, 2022 at 04:11:36PM -0400 Quoting John R Levine (johnl@taugh.com):
>
>> If you remember the type 99 SPF record introduced by RFC 4408, after a decade
>> approximately nobody had implemented it so we took it out of RFC 7208.  I
>> don't see why an updated lookup limit would be implemented any faster.
>
>For the record: I am going to defer taking Type 99 SPF records out of
>my zones some 30 years.
>
>Type-squatting is stupid. 

We took type 99 out of RFC 7208 in the sense that SPF clients don't look for them any more.  The
RRTYPE still exists, DNS servers still handle them, and if you want to publish them for old times'
sake, sure, go ahead.

There are about 90 defined RRTYPEs and 65,000 unassigned code points so it's not like we're going
to run out of types, or that we have ever reclaimed obsolete type codes.

R's,
John

PS: Perhaps I will offer a small prize for the best repurposing of an otherwise unused RRTYPE that
has the same syntax as TXT records.

-- 
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

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